Materiały źródłowe

• #1 Mayo Clinic Health Library – Antibiotic-associated diarrhea | Swiss Medical Network

  https://www.swissmedical.net/en/healtcare-library/con-20166948

  Antibiotic-associated diarrhea refers to passing loose, watery stools three or more times a day after taking medications used to treat bacterial infections (antibiotics). […] To diagnose antibiotic-associated diarrhea, your doctor is likely to question you about your health history, including whether you’ve had recent antibiotic treatments. If your doctor suspects that you have C. difficile infection, a sample of your stool would be tested for the bacterium.

• #2 Antibiotic-associated diarrhea | Altru Health System

  https://www.altru.org/health-library/conditions/antibiotic-associated-diarrhea

  Antibiotic-associated diarrhea refers to passing loose, watery stools three or more times a day after taking medications used to treat bacterial infections (antibiotics). […] Call your doctor right away if you have serious signs and symptoms of antibiotic-associated diarrhea. These signs and symptoms are common to a number of conditions, so your doctor might recommend tests such as stool or blood tests to determine the cause. […] To diagnose antibiotic-associated diarrhea, your doctor is likely to question you about your health history, including whether you’ve had recent antibiotic treatments. If your doctor suspects that you have C. difficile infection, a sample of your stool would be tested for the bacterium.

• #3 Antibiotic-Associated Diarrhea Beyond C. Difficile: A Scoping Review | Published in Journal of Brown Hospital Medicine

  https://bhm.scholasticahq.com/article/39745-antibiotic-associated-diarrhea-beyond-c-difficile-a-scoping-review

  A common complication of antibiotic use is the development of diarrheal illness. The pathogenesis of antibiotic associated diarrhea (AAD) may be mediated through alteration of intestinal microbiota, overgrowth of opportunistic pathogens, and direct drug toxicity on the gut. Currently fewer than 33% of AAD cases can be attributable to Clostridioides difficile leaving a large number of cases undiagnosed and poorly treated. Although the pathogenesis of Clostridioides difficile infection (CDI) has been well documented, the role of other putative microbial etiologies (Clostridium perfringens, Staphylococcus aureus, Klebsiella oxytoca, Candida species) and their pathogenic mechanisms in AAD has been unclear. […] Antibiotic associated diarrhea (AAD) is defined as passage of three or more unformed stools per day beginning anywhere from within a few hours up to 8 weeks after starting antibiotic therapy. The frequency of AAD has been reported to occur in 5-35% persons exposed to antimicrobials and varies upon the class of antibiotics received, health of the host and exposure to pathogens. AAD may range from mild, self-limiting illness to fulminant, pseudomembranous colitis that can be life threatening.

• #4 Focus on antibiotic associated diarrhea (AAD) | Content for health professionals | Microbiota institute

  https://www.biocodexmicrobiotainstitute.com/en/pro/focus-antibiotic-associated-diarrhea-aad

  If the use of probiotics for preventing antibiotic-associated diarrhea (AAD) is considered because of the existence of risk factors such as class of antibiotic(s), duration of antibiotic treatment, age, need for hospitalization, comorbidities, or previous episodes of AAD, healthcare professionals may recommend high doses (5 billion CFU/day) of S. boulardii or L. rhamnosus GG started simultaneously with antibiotic treatment to prevent AAD in outpatients and hospitalized children (certainty of evidence: moderate; grade of recommendation: strong). […] AAD can take anywhere from 2 hours to 8-10 weeks to develop after antibiotic use. […] Antibiotic Associated Diarrhea (AAD) is a common side effect of antibiotics. Age, spectrum of antibiotics used, underlying illness and recent surgery have been identified as risk factors. Recent evidence shows a new one: composition of the microbiota. In patients treated with -lactams, higher relative abundances of Bacteroides were inversely associated with AAD while higher baseline abundance of Bifidobacterium species and Lachnospiraceae and amino acid biosynthesis pathways (AABP) were associated with AAD. Relative abundances of potentially protective taxa and levels AABP may distinguish children who did and did not experience AAD. Further studies are needed to investigate whether similar trends are observed across different antibiotic types. The identified potentially protective taxa may inform the development of preventive approaches for AAD.

• #5 Antibiotics and antibiotic-associated diarrhea: a real-world disproportionality study of the FDA adverse event reporting system from 2004 to 2022 | BMC Pharmacology and Toxicology | Full Text

  https://bmcpharmacoltoxicol.biomedcentral.com/articles/10.1186/s40360-023-00710-w

  The excessive use of broad-spectrum antibiotics disrupts the balance of healthy gut bacteria and leads to AAD. Approximately 5%~35% of patients suffer from AAD after receiving antibiotics. […] The incidence rate of AAD shows an upward trend due to the widespread use of antibiotics. […] Our findings showed that patients aged 65 years or older had a higher ROR value, indicating that their probability of developing AAD was higher. […] Additionally, females accounted for a larger proportion than males in all reports. This result suggests that females may be more susceptible to AAD than males, potentially due to differences in gut flora between genders. […] The study found that nearly all antibiotics were strongly associated with AAD events. […] When the ROR value was calculated for each antibiotic, cefditoren, cephradine, and lincomycin had the highest ROR values.

• #6 Focus on antibiotic associated diarrhea (AAD) | Content for health professionals | Microbiota institute

  https://www.biocodexmicrobiotainstitute.com/en/pro/focus-antibiotic-associated-diarrhea-aad

  Antibiotics are a powerful tool in the fight against bacterial infections, however they also disrupt the protective intestinal microbiota and this can lead to unintended consequences including antibiotic-associated diarrhea (AAD) in as much as 35% of patients. The incidence of AAD depends on several factors: age (among children this percentage can reach up to 80%), setting, type of antibiotic, etc. Most of the time, AAD is caused by antibiotic-induced dysbiosis, is of mild intensity and is self-limiting, lasting between 1 and 5 days. […] While the etiologies for AAD are diverse, approximately one-third of AAD cases are attributed to C. difficile. Under certain conditions, C. difficile will trigger an inflammatory response leading to a range of clinical outlooks, from mild diarrhea to pseudomembranous colitis, toxic megacolon and/or death.

• #7 Antibiotics Diarrhea: Causes, Treatment, and Prevention

  https://www.healthline.com/health/antibiotics-diarrhea

  Antibiotic-associated diarrhea is caused by disrupting the bacterial balance in your intestines. Certain antibiotics are more likely to cause it, such as penicillins and cephalosporins. […] Antibiotic-associated diarrhea is fairly common. Its estimated that between 5 and 25 percent of adults may experience diarrhea while taking antibiotics. […] Antibiotics can disrupt the balance of these bacteria. One of the side effects of killing off the good bacteria, in addition to the bad bacteria, is the possibility of looser stools. […] Antibiotic-associated diarrhea is defined as having loose, watery stools three or more times per day while taking antibiotics. […] Although all antibiotics can cause diarrhea, some types are more closely associated with the condition. […] Antibiotics that have a higher likelihood of causing diarrhea include: penicillins, such as ampicillin and amoxicillin; cephalosporins, such as cephalexin and cefpodoxime; clindamycin.

• #8 Can Antibiotics Cause Diarrhea? Symptoms, Treatment, and Prevention Tips

  https://www.everydayhealth.com/digestive-health/can-antibiotics-cause-diarrhea/

  Certain antibiotics are more likely than others to cause diarrhea, including: Cephalosporins like cefdinir (Omnicef) and cephalexin (Keflex), Fluoroquinolones such as ciprofloxacin (Cipro) and levofloxacin (Levaquin), Macrolides like clarithromycin (Biaxin) and clindamycin (Cleocin), Penicillins such as amoxicillin (Amoxil). […] Certain antibiotics, including clindamycin, fluoroquinolones, cephalosporins, and penicillins, cause a type of bacteria called Clostridioides difficile (C. diff) to multiply out of control. These bacteria release a toxin that attacks the lining of the intestines. A C. diff infection produces more severe symptoms like bloody diarrhea, weight loss, nausea, and vomiting. […] Loose stools usually appear within a week after you start taking the antibiotic and can last for a few days. But sometimes, you may not see any symptoms until after you’ve finished taking the antibiotic.

• #9 Antibiotics Diarrhea: Causes, Treatment, and Prevention

  https://www.healthline.com/health/antibiotics-diarrhea

  Antibiotic-associated diarrhea is caused by disrupting the bacterial balance in your intestines. Certain antibiotics are more likely to cause it, such as penicillins and cephalosporins. […] Antibiotic-associated diarrhea is fairly common. Its estimated that between 5 and 25 percent of adults may experience diarrhea while taking antibiotics. […] Antibiotics can disrupt the balance of these bacteria. One of the side effects of killing off the good bacteria, in addition to the bad bacteria, is the possibility of looser stools. […] Antibiotic-associated diarrhea is defined as having loose, watery stools three or more times per day while taking antibiotics. […] Although all antibiotics can cause diarrhea, some types are more closely associated with the condition. […] Antibiotics that have a higher likelihood of causing diarrhea include: penicillins, such as ampicillin and amoxicillin; cephalosporins, such as cephalexin and cefpodoxime; clindamycin.

• #10 C. diff: Facts for Clinicians | C. diff | CDC

  https://www.cdc.gov/c-diff/hcp/clinical-overview/index.html

  Clostridioides difficile (C. diff) is a common cause of antibiotic-associated diarrhea (AAD). It accounts for 15 to 25% of all events of AAD. […] Patients with CDI exhibit clinical symptoms and test positive for the C. diff organism or its toxin. […] If a patient has had three or more stools in 24 hours: Order a C. diff test if other etiologies of diarrhea such as stool softener or laxative were not used. […] In about 20% of patients, CDI will resolve within two to three days of discontinuing the antibiotic to which the patient was previously exposed. However, CDI should usually be treated with an appropriate course (about 10 days) of treatment, including oral vancomycin or fidaxomicin. After treatment, repeat C. diff testing is not recommended if the patient’s symptoms have resolved, as patients often remain colonized.

• #11 Patient education: Antibiotic-associated diarrhea caused by Clostridioides difficile (Beyond the Basics) – UpToDate

  https://www.uptodate.com/contents/antibiotic-associated-diarrhea-caused-by-clostridioides-difficile-beyond-the-basics/print

  Antibiotic-associated diarrhea refers to diarrhea that develops in a person who is taking or recently took antibiotics. One of the most serious causes of antibiotic-associated diarrhea is infection with a bacterium called Clostridioides difficile. C. difficile infections are common, with approximately 500,000 cases per year in the United States. Infection is most common in people who are hospitalized, producing disease in more than 8 hospitalized patients per 1000 (0.9 percent) in 2008 in the United States. […] This topic review discusses the causes, symptoms, diagnosis, and treatment of C. difficile-associated diarrhea. […] The diagnosis of C. difficile is based upon laboratory analysis of a stool sample to identify toxin-producing C. difficile or its toxins. […] If symptoms return, it is important for a health care provider to confirm that C. difficile is the cause of the symptoms (rather than another condition).

• #12 Antibiotic-associated diarrhea | Radiology Reference Article | Radiopaedia.org

  https://radiopaedia.org/articles/antibiotic-associated-diarrhoea?lang=us

  Antibiotic-associated diarrhea can be broadly divided into two groups: Clostridioides difficile colitis and non-specific diarrhea. […] The former is a life-threatening condition, requiring prompt diagnosis and treatment whereas the later is milder and self-limiting. […] Both result from changes in the bowel flora following administration of typically broad spectrum antibiotics.

• #13 Antibiotic-associated diarrhea – Wikipedia

  https://en.wikipedia.org/wiki/Antibiotic-associated_diarrhea

  Antibiotic-associated diarrhea (AAD) results from an imbalance in the colonic microbiota caused by antibiotics. […] It is defined as frequent loose and watery stools with no other complications. […] Clostridioides difficile, also known more commonly as C. diff, accounts for 10 to 20% of antibiotic-associated diarrhea cases, because the antibiotics administered for the treatment of certain disease processes such as inflammatory colitis also inadvertently kill a large portion of the gut flora, the normal flora that is usually present within the bowel. […] Meta-analyses have concluded that probiotics may protect against antibiotic-associated diarrhea in both children and adults. […] The efficacy of probiotic AAD prevention is dependent on the probiotic strain(s) used and on the dosage.

• #14 Antibiotics Diarrhea: Causes, Treatment, and Prevention

  https://www.healthline.com/health/antibiotics-diarrhea

  Antibiotic-associated diarrhea is caused by disrupting the bacterial balance in your intestines. Certain antibiotics are more likely to cause it, such as penicillins and cephalosporins. […] Antibiotic-associated diarrhea is fairly common. Its estimated that between 5 and 25 percent of adults may experience diarrhea while taking antibiotics. […] Antibiotics can disrupt the balance of these bacteria. One of the side effects of killing off the good bacteria, in addition to the bad bacteria, is the possibility of looser stools. […] Antibiotic-associated diarrhea is defined as having loose, watery stools three or more times per day while taking antibiotics. […] Although all antibiotics can cause diarrhea, some types are more closely associated with the condition. […] Antibiotics that have a higher likelihood of causing diarrhea include: penicillins, such as ampicillin and amoxicillin; cephalosporins, such as cephalexin and cefpodoxime; clindamycin.

• #15 Antibiotic-Associated Diarrhea Beyond C. Difficile: A Scoping Review | Published in Journal of Brown Hospital Medicine

  https://bhm.scholasticahq.com/article/39745-antibiotic-associated-diarrhea-beyond-c-difficile-a-scoping-review

  The likely pathogenesis of AAD includes alteration of intestinal microbiota, direct drug toxicity on the gut and development of a superinfection by a pathogenic microbe. Identifying the etiology and understanding the pathogenesis of AAD will help in improving healthcare and in reducing the economic burden. […] It is essential to rule out other causes of AAD such as infection. For CDI, the diagnosis is commonly made by detection of Clostridioides difficile toxins by enzyme linked immunoassay (EIA) or using DNA based tests that identify the microbial toxin genes in unformed stool. Stool cultures may be sent to rule out other pathogens, if clinically indicated.

• #16 Antibiotic-Associated Diarrhea Beyond C. Difficile: A Scoping Review | Published in Journal of Brown Hospital Medicine

  https://bhm.scholasticahq.com/article/39745

  A common complication of antibiotic use is the development of diarrheal illness. The pathogenesis of antibiotic associated diarrhea (AAD) may be mediated through alteration of intestinal microbiota, overgrowth of opportunistic pathogens, and direct drug toxicity on the gut. Currently fewer than 33% of AAD cases can be attributable to Clostridioides difficile leaving a large number of cases undiagnosed and poorly treated. Although the pathogenesis of Clostridioides difficile infection (CDI) has been well documented, the role of other putative microbial etiologies (Clostridium perfringens, Staphylococcus aureus, Klebsiella oxytoca, Candida species) and their pathogenic mechanisms in AAD has been unclear. […] Antibiotic associated diarrhea (AAD) is defined as passage of three or more unformed stools per day beginning anywhere from within a few hours up to 8 weeks after starting antibiotic therapy. The frequency of AAD has been reported to occur in 5-35% persons exposed to antimicrobials and varies upon the class of antibiotics received, health of the host and exposure to pathogens. AAD may range from mild, self-limiting illness to fulminant, pseudomembranous colitis that can be life threatening.

• #17 Managing antibiotic associated diarrhoea

  https://pmc.ncbi.nlm.nih.gov/articles/PMC1123310/

  Diarrhoea is a common adverse effect of antibiotic treatments. Antibiotic associated diarrhoea occurs in about 5-30% of patients either early during antibiotic therapy or up to two months after the end of the treatment. The frequency of antibiotic associated diarrhoea depends on the definition of diarrhoea, the inciting antimicrobial agents, and host factors. […] Clinical presentations of antibiotic associated diarrhoea range from mild diarrhoea to fulminant pseudomembranous colitis. The latter is characterised by a watery diarrhoea, fever (in 80% of cases), leucocytosis (80%), and the presence of pseudomembranes on endoscopic examination. […] In cases of severe or persistent antibiotic associated diarrhoea, the challenge is to identify C difficile associated infections since this is the most common identifiable and treatable pathogen. Diagnosis relies on detecting toxins A or B in stools. […] Treatment of C difficile related diarrhoea is based on oral metronidazole (250 mg four times daily) or oral vancomycin (125 mg four times daily) for 10 days. […] The key measure for preventing antibiotic associated diarrhoea, however, is to limit antibiotic use.

• #18 Antibiotic-Associated Diarrhea – Harvard Health

  https://www.health.harvard.edu/a_to_z/antibiotic-associated-diarrhea-a-to-z

  If you have unexplained diarrhea, and you are taking antibiotics, be sure to tell your doctor the name of your prescription antibiotic, the date when you first began treatment and the date when your bowel symptoms began. […] In most cases, your doctor can diagnose antibiotic-associated diarrhea based on your symptoms, your history of antibiotic treatment and the results of your physical examination. […] Your doctor is likely to suspect C. difficile infection if you have unusually severe symptoms, if you have been discharged recently from a hospital or nursing home, or if you have: a fever over 101 Fahrenheit, severe diarrhea (more than 10 watery stools daily), signs of significant dehydration (dry mouth, intense thirst, decreased urination, weakness), stool that contains blood or pus, abdominal pain. […] This testing usually involves checking one or more stool samples for the presence of a toxin made by C. difficile bacteria.

• #19 Antibiotic-Associated Diarrhea – Gastrointestinal Infections – Intestinal Diseases – Gastrointestinal Diseases – Gastroenterology – Diseases – McMaster Textbook of Internal Medicine

  https://empendium.com/mcmtextbook/chapter/B31.II.4.24.1.7.

  Antibiotic-associated diarrhea develops in the course of antimicrobial treatment or within 2 months of its discontinuation. […] Diagnosis and treatment: see Clostridioides difficile Infection.

• #20 Antibiotic-Associated Diarrhea – Harvard Health

  https://www.health.harvard.edu/a_to_z/antibiotic-associated-diarrhea-a-to-z

  If you have unexplained diarrhea, and you are taking antibiotics, be sure to tell your doctor the name of your prescription antibiotic, the date when you first began treatment and the date when your bowel symptoms began. […] In most cases, your doctor can diagnose antibiotic-associated diarrhea based on your symptoms, your history of antibiotic treatment and the results of your physical examination. […] Your doctor is likely to suspect C. difficile infection if you have unusually severe symptoms, if you have been discharged recently from a hospital or nursing home, or if you have: a fever over 101 Fahrenheit, severe diarrhea (more than 10 watery stools daily), signs of significant dehydration (dry mouth, intense thirst, decreased urination, weakness), stool that contains blood or pus, abdominal pain. […] This testing usually involves checking one or more stool samples for the presence of a toxin made by C. difficile bacteria.

• #21 Antibiotic-Associated Diarrhea – Canadian Digestive Health Foundation

  https://cdhf.ca/en/antibiotic-associated-diarrhea/

  Symptoms include: Fever, Abdominal pain or tenderness, Profuse watery diarrhea with mucus and/or blood, Dehydration – typical signs and symptoms include feeling tired and lightheaded, thirsty, passing dark coloured urine and less frequent urination, Nausea and loss of appetite (Lewis, 2022; Barbut & Meynard, 2002). […] However, in some cases your doctor may decide to stop the antibiotic until symptoms resolve. Your doctor may also order some tests to determine the cause of diarrhea and depending on the results and/or the severity of your symptoms you may require hospital admission. If C. diff is found to be the cause of AAD, another antibiotic may need to be prescribed for treatment (Kelly & Lamont, 2021; Giannelli 2017). […] Many studies have demonstrated that probiotics may help prevent or reduce the risk of antibiotic-associated diarrhea (Barbut & Meynard, 2002). […] It has been proven that Florastor probiotics reduces the incidence of antibiotic-associated diarrhea by up to 80% in children and up to 84% in adults (Kotowska et. Al, 2005).

• #22 Can Antibiotics Cause Diarrhea? Symptoms, Treatment, and Prevention Tips

  https://www.everydayhealth.com/digestive-health/can-antibiotics-cause-diarrhea/

  Symptoms of C. diff diarrhea include: Severe watery diarrhea, Abdominal cramps, Fever, Pus or blood in the stools, Low-grade fever, Nausea, Appetite loss. […] Mild diarrhea should clear up within a few days after you finish taking antibiotics. If it’s severe, your doctor might recommend stopping antibiotics until the diarrhea improves. C. diff diarrhea can take longer to clear up, and it may come back after you treat it. […] Call your doctor if you’ve been taking antibiotics and you have: More than five loose stools a day, A fever, Pain or tenderness in your belly, Blood or pus in your stool, Signs of dehydration, which include a very dry mouth, little or no urination, dizziness, or weakness. […] To manage severe diarrhea, stop taking the antibiotic that caused it. Your doctor may put you on an antibiotic like fidaxomicin (Dificid) or vancomycin (Firvanq) to treat a C. diff infection. In the rare but very serious situation when antibiotics don’t work and the infection becomes life-threatening, surgery may be performed to remove the affected portion of the colon.

• #23 Clostridioides (Clostridium) Difficile Colitis: Background, Etiology, Pathophysiology

  https://emedicine.medscape.com/article/186458-overview

  Clostridioides difficile (formerly Clostridium difficile) is a gram-positive, anaerobic, spore-forming bacillus that is responsible for the development of antibiotic-associated diarrhea and colitis. C difficile colitis results from a disturbance of the normal bacterial flora of the colon, colonization by C difficile, and the release of toxins that cause mucosal inflammation and damage. […] The diagnosis of C difficile colitis should be suspected in any patient with diarrhea who has received antibiotics within the previous 3 months, has been recently hospitalized, and/or has an occurrence of diarrhea 48 hours or more after hospitalization. […] However, more recent studies have shown that C difficile can be the cause of diarrhea in community dwellers without previous hospitalization or antibiotic exposure; therefore, the diagnosis should be suspected in this population as well. […] Once infected with C difficile, the rate of disease recurrence is 20-40% when using metronidazole and vancomycin antibiotics as first-line therapy. […] Fidaxomicin is now recommended as first-line treatment due to a lower risk of CDI recurrence.

• #24 Clostridioides (formerly Clostridium) difficile–Induced Diarrhea – Infectious Diseases – Merck Manual Professional Edition

  https://www.merckmanuals.com/professional/infectious-diseases/anaerobic-bacteria/clostridioides-formerly-clostridium-difficile-induced-diarrhea

  Toxins produced by Clostridioides difficile strains in the gastrointestinal tract cause pseudomembranous colitis, typically after antibiotic use. Diagnosis is by identifying C. difficile toxin in stool. […] C. difficile induced diarrhea should be suspected in any patient who develops diarrhea within 2 months of antibiotic use or 72 hours of hospital admission. […] Diagnose using a stool assay for C. difficile antigen and toxin and sometimes PCR testing for the toxin gene.

• #25 Antibiotic-associated diarrhea – Diagnosis & treatment – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/antibiotic-associated-diarrhea/diagnosis-treatment/drc-20352237

  To diagnose antibiotic-associated diarrhea, your doctor is likely to question you about your health history, including whether you’ve had recent antibiotic treatments. If your doctor suspects that you have C. difficile infection, a sample of your stool would be tested for the bacterium. […] For antibiotic-associated diarrhea, some basic questions to ask your doctor include: What tests do I need? […] Your doctor is likely to ask you a number of questions. Being ready to answer them may allow more time to cover other points you want to address. Your doctor may ask: When did your symptoms begin? […] Continue taking your antibiotics as directed by your doctor.

• #26 Clostridium difficile–Associated Diarrhea | AAFP

  https://www.aafp.org/pubs/afp/issues/2005/0301/p921.html

  The diagnosis of C. difficile associated diarrhea requires a careful history, with particular emphasis on antibiotic use during the preceding three months. The clinical presentation ranges from no symptoms to fulminant pseudomembranous colitis. A detailed description of the patients diarrhea, including color, consistency, and frequency, is important in differentiating other causes of diarrhea from C. difficile associated diarrhea. […] The most common laboratory test for diagnosing C. difficile mediated disease is an enzyme immunoassay that detects toxins A and B. This test provides results within two to six hours and has a specificity of 93 to 100 percent. The sensitivity is 63 to 99 percent, which means that false-negative results can occur. […] The gold standard for the diagnosis of C. difficile mediated disease is a cytotoxin assay. Although this test is highly sensitive and specific, it is difficult to perform, and results are not available for 24 to 48 hours.

• #27 Antibiotic-associated diarrhea – Diagnosis & treatment – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/antibiotic-associated-diarrhea/diagnosis-treatment/drc-20352237

  To diagnose antibiotic-associated diarrhea, your doctor is likely to question you about your health history, including whether you’ve had recent antibiotic treatments. If your doctor suspects that you have C. difficile infection, a sample of your stool would be tested for the bacterium. […] For antibiotic-associated diarrhea, some basic questions to ask your doctor include: What tests do I need? […] Your doctor is likely to ask you a number of questions. Being ready to answer them may allow more time to cover other points you want to address. Your doctor may ask: When did your symptoms begin? […] Continue taking your antibiotics as directed by your doctor.

• #28 IDSA 2017 Clinical Practice Guidelines for the Diagnosis and Management of Infectious Diarrhea

  https://www.idsociety.org/practice-guideline/infectious-diarrhea/

  Stool testing should be performed for Salmonella, Shigella, Campylobacter, Yersinia, C. difficile, and STEC in people with diarrhea accompanied by fever, bloody or mucoid stools, severe abdominal cramping or tenderness, or signs of sepsis (strong, moderate). […] Testing may be considered for C. difficile in people 2 years of age who have a history of diarrhea following antimicrobial use and in people with healthcare-associated diarrhea (weak, high). […] A detailed clinical and exposure history should be obtained from people with diarrhea, under any circumstances, including when there is a history of similar illness in others (strong, moderate). […] People with fever or bloody diarrhea should be evaluated for enteropathogens for which antimicrobial agents may confer clinical benefit, including Salmonella enterica subspecies, Shigella, and Campylobacter (strong, low).

• #29 Clostridium difficile–Associated Diarrhea | AAFP

  https://www.aafp.org/pubs/afp/issues/2005/0301/p921.html

  The diagnosis of C. difficile associated diarrhea requires a careful history, with particular emphasis on antibiotic use during the preceding three months. The clinical presentation ranges from no symptoms to fulminant pseudomembranous colitis. A detailed description of the patients diarrhea, including color, consistency, and frequency, is important in differentiating other causes of diarrhea from C. difficile associated diarrhea. […] The most common laboratory test for diagnosing C. difficile mediated disease is an enzyme immunoassay that detects toxins A and B. This test provides results within two to six hours and has a specificity of 93 to 100 percent. The sensitivity is 63 to 99 percent, which means that false-negative results can occur. […] The gold standard for the diagnosis of C. difficile mediated disease is a cytotoxin assay. Although this test is highly sensitive and specific, it is difficult to perform, and results are not available for 24 to 48 hours.

• #30 Managing antibiotic associated diarrhoea

  https://pmc.ncbi.nlm.nih.gov/articles/PMC1123310/

  Diarrhoea is a common adverse effect of antibiotic treatments. Antibiotic associated diarrhoea occurs in about 5-30% of patients either early during antibiotic therapy or up to two months after the end of the treatment. The frequency of antibiotic associated diarrhoea depends on the definition of diarrhoea, the inciting antimicrobial agents, and host factors. […] Clinical presentations of antibiotic associated diarrhoea range from mild diarrhoea to fulminant pseudomembranous colitis. The latter is characterised by a watery diarrhoea, fever (in 80% of cases), leucocytosis (80%), and the presence of pseudomembranes on endoscopic examination. […] In cases of severe or persistent antibiotic associated diarrhoea, the challenge is to identify C difficile associated infections since this is the most common identifiable and treatable pathogen. Diagnosis relies on detecting toxins A or B in stools. […] Treatment of C difficile related diarrhoea is based on oral metronidazole (250 mg four times daily) or oral vancomycin (125 mg four times daily) for 10 days. […] The key measure for preventing antibiotic associated diarrhoea, however, is to limit antibiotic use.

• #31 :: IC :: Infection & Chemotherapy

  https://icjournal.org/DOIx.php?id=10.3947/ic.2019.51.2.217

  Most acute inflammatory diarrhea is caused by Campylobacter, C. difficile, enterohemorrhagic E. coli (EHEC), EIEC, Salmonella, Shigella, and Yersinia, and non-inflammatory diarrhea is caused by Clostridium food poisoning, ETEC, Staphylococcus, Vibrio cholerae, viruses (norovirus and rotavirus), and parasites (Giardia and Cryptosporidium). […] Although stool leukocyte or lactoferrin test is not widely used in acute diarrhea patients in Korea, they are screening tests used for diagnosis of intestinal inflammation abroad. […] When infectious diarrhea is suspected, blood culture may be helpful in identifying the pathogen in patients with septic findings, patients with suspected enteric fever, and suppressed patients with fever. […] Although acute infectious diarrhea is common in healthy individuals, most cases do not require tests or treatment as they recover spontaneously within short period.

• #32 When to Suspect Diarrhea is Symptom of a Clostridium difficile Infection

  https://www.contagionlive.com/view/when-to-suspect-diarrhea-is-symptom-of-a-iclostridium-difficile-i-infection

  One of the most important principles in testing for Clostridium difficile is that the diarrhea should be unexplained. […] You should only be testing those people that at least have clinically significant diarrhea. […] Severe is classified as patients that have a white count of 15,000, that have an albumin of less than 3, and abdominal tenderness.

• #33 Post-Travel Diarrhea | Yellow Book | CDC

  https://www.cdc.gov/yellow-book/hcp/post-travel-evaluation/post-travel-diarrhea.html

  Clostridioides difficile-associated diarrhea can occur after or during antibiotic use, including malaria chemoprophylaxis. The association between C. difficile and antimicrobial treatment is especially important to consider in patients with persistent TD that seems refractory to multiple courses of empiric antibiotic therapy. The initial workup of persistent TD should always include C. difficile testing. Healthcare professionals can prescribe oral vancomycin, fidaxomicin, or, less optimally, metronidazole, to treat C. difficile. Recurrent cases may be treated with fecal microbiota transplantation, now available by the oral route or as a retention enema. The monoclonal antibody bezlotoxumab is also an option. […] Traditional methods of microbial diagnosis of diarrheal illness include stool culture, antigen detection using enzyme immunoassays, and microscopy. For detection of bacteria, routine stool culture will identify Campylobacter, Shigella, Salmonella, Aeromonas, and Plesiomonas. Special culture methods are required for Yersinia and Vibrio species. Diagnosis of C. difficile can be made by antigen detection and PCR.

• #34 Antibiotic-associated diarrhea: Clinical characteristics and the presence of Clostridium difficile | Revista de Gastroenterología de México

  https://www.revistagastroenterologiamexico.org/en-antibiotic-associated-diarrhea-clinical-characteristics-presence-articulo-S2255534X17300142

  There are numerous methods for diagnosing CD infection. Polymerase chain reaction (PCR) is a highly sensitive technique that utilizes DNA initiators to amplify two specific genes, different from the CD toxigenic strains: tcdB that encodes the B toxin and tcdC that encodes a regulatory pathway of the toxin. […] The aim of the present study was to describe the clinical characteristics of patients with AAD, as well as the first Latin American experience utilizing the PCR technique for determining the presence of CD in that group of patients. […] The present study is the first conducted on a Colombian population that describes the demographic characteristics, antibiotic management profiles, clinical manifestations, risk factors, and paraclinical reports in patients with AAD. […] CD infection was confirmed by PCR in 6 of the 43 cases (13.9%), close to the 15% reported in a larger case series by Kyne et al., and the 15-25% of CD infection described by other authors. […] Finally, it is worth emphasizing that only 15% of the patients with AAD were positive for CD infection in the PCR test, making it very important to consider other causes of diarrhea in the hospitalized patient.

• #35 Antibiotic-associated diarrhea – Symptoms & causes – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/antibiotic-associated-diarrhea/symptoms-causes/syc-20352231

  Antibiotic-associated diarrhea refers to passing loose, watery stools three or more times a day after taking medications used to treat bacterial infections (antibiotics). […] Call your doctor right away if you have serious signs and symptoms of antibiotic-associated diarrhea. These signs and symptoms are common to a number of conditions, so your doctor might recommend tests such as stool or blood tests to determine the cause.

• #36

  https://pmc.ncbi.nlm.nih.gov/articles/PMC6334067/

  Antibiotic-associated diarrhoea is among the most common adverse events related to antibiotic use. […] Typical laboratory tests for the presence of C difficile do not have high sensitivity and specificity in isolation, so a combination of tests should be used when making the diagnosis of CDI. […] Diagnosis of CDI may be difficult for several reasons. First, the currently available tests lack ideal sensitivity and specificity. Second, C difficile may either cause asymptomatic colonisation or active gastrointestinal infection, and conventional tests do not clearly differentiate between these two states. Therefore, guidelines recommend testing for CDI only when a patient has diarrhoea and grounds for suspecting an infective aetiology. […] Given the variability of the sensitivity and specificity of these tests, a two-stage testing algorithm is widely applied. In the UK, toxin A/B enzyme immunoassay (EIA) testing is often used after an initial glutamate dehydrogenase (GDH) or polymerase chain reaction (PCR) screen. […] Where clinicians have a strong clinical suspicion of CDI, empirical therapy should be considered regardless of the laboratory result; this is because with a high pre-test probability, the negative predictive value of the tests that are currently available is insufficient to exclude disease.

• #37 Clostridium difficile–Associated Diarrhea | AAFP

  https://www.aafp.org/pubs/afp/issues/2005/0301/p921.html

  An important indicator of impending fulminant colitis is a sudden rise in the peripheral WBC count to between 30,000 and 50,000 per mm3 (30 to 50 10^9 per L), often accompanied by significant bandemia. […] In patients with fulminant C. difficile associated diarrhea, flexible sigmoidoscopy can provide an immediate diagnosis. The finding of pseudomembranes is pathognomonic for C. difficile colitis. CT scanning also can diagnose fulminant disease quickly. When considered with the clinical history, the presence of ascites, colon wall thickening, or dilation can help categorize the severity of the colitis.

• #38 When to Suspect Diarrhea is Symptom of a Clostridium difficile Infection

  https://www.contagionlive.com/view/when-to-suspect-diarrhea-is-symptom-of-a-iclostridium-difficile-i-infection

  One of the most important principles in testing for Clostridium difficile is that the diarrhea should be unexplained. […] You should only be testing those people that at least have clinically significant diarrhea. […] Severe is classified as patients that have a white count of 15,000, that have an albumin of less than 3, and abdominal tenderness.

• #39 Australasian Society for Infectious Diseases guidelines for the diagnosis and treatment of Clostridium difficile infection | The Medical Journal of Australia

  https://www.mja.com.au/journal/2011/194/7/australasian-society-infectious-diseases-guidelines-diagnosis-and-treatment

  Clostridium difficile is the most common cause of health care-associated and antibiotic-associated diarrhoea. […] These guidelines are intended to provide advice to clinicians on the clinical assessment, diagnosis and management of C. difficile infection (CDI). […] Diagnostic tests include stool culture, polymerase chain reaction-based assays, cell-culture cytotoxicity assays and enzyme immunoassays detecting C. difficile glutamate dehydrogenase, and/or toxin A and/or B. […] CDI should be suspected in any hospitalised patient who develops diarrhoea or any person in the community who develops diarrhoea after a course of antibiotics or in association with immunosuppressive therapy. […] Only a third of patients with antibiotic-associated diarrhoea have confirmed CDI, so diagnostic tests are essential.

• #40 IDSA 2017 Clinical Practice Guidelines for the Diagnosis and Management of Infectious Diarrhea

  https://www.idsociety.org/practice-guideline/infectious-diarrhea/

  Stool testing should be performed for Salmonella, Shigella, Campylobacter, Yersinia, C. difficile, and STEC in people with diarrhea accompanied by fever, bloody or mucoid stools, severe abdominal cramping or tenderness, or signs of sepsis (strong, moderate). […] Testing may be considered for C. difficile in people 2 years of age who have a history of diarrhea following antimicrobial use and in people with healthcare-associated diarrhea (weak, high). […] A detailed clinical and exposure history should be obtained from people with diarrhea, under any circumstances, including when there is a history of similar illness in others (strong, moderate). […] People with fever or bloody diarrhea should be evaluated for enteropathogens for which antimicrobial agents may confer clinical benefit, including Salmonella enterica subspecies, Shigella, and Campylobacter (strong, low).

• #41 Australasian Society for Infectious Diseases guidelines for the diagnosis and treatment of Clostridium difficile infection | The Medical Journal of Australia

  https://www.mja.com.au/journal/2011/194/7/australasian-society-infectious-diseases-guidelines-diagnosis-and-treatment

  Testing should only be performed on unformed (liquid) stools, because a positive result in a formed stool only signifies colonisation. […] Assays that are available to diagnose CDI fall into five groups. […] The detection of C. difficile toxin in a cell-based cytotoxic assay (CCA) or toxigenic culture of C. difficile obtained from stool are generally regarded as the gold standards for diagnosis. […] EIA for C. difficile GDH (or common antigen) may be used as a screening test. […] PCR-based assays for detection of genes encoding toxin B (tcdB) are commercially available, as are in-house assays targeting various targets within the pathogenicity locus of C. difficile, which includes genes tcdA and tcdB, and adjacent accessory genes tcdC, tcdR and tcdE. […] The optimal diagnostic algorithm (for sensitivity and cost) is controversial, but likely to evolve as better, more cost-effective tests become available.

• #42

  https://pmc.ncbi.nlm.nih.gov/articles/PMC6334067/

  Antibiotic-associated diarrhoea is among the most common adverse events related to antibiotic use. […] Typical laboratory tests for the presence of C difficile do not have high sensitivity and specificity in isolation, so a combination of tests should be used when making the diagnosis of CDI. […] Diagnosis of CDI may be difficult for several reasons. First, the currently available tests lack ideal sensitivity and specificity. Second, C difficile may either cause asymptomatic colonisation or active gastrointestinal infection, and conventional tests do not clearly differentiate between these two states. Therefore, guidelines recommend testing for CDI only when a patient has diarrhoea and grounds for suspecting an infective aetiology. […] Given the variability of the sensitivity and specificity of these tests, a two-stage testing algorithm is widely applied. In the UK, toxin A/B enzyme immunoassay (EIA) testing is often used after an initial glutamate dehydrogenase (GDH) or polymerase chain reaction (PCR) screen. […] Where clinicians have a strong clinical suspicion of CDI, empirical therapy should be considered regardless of the laboratory result; this is because with a high pre-test probability, the negative predictive value of the tests that are currently available is insufficient to exclude disease.

• #43 Clostridium difficile–Associated Diarrhea | AAFP

  https://www.aafp.org/pubs/afp/issues/2005/0301/p921.html

  The diagnosis of C. difficile associated diarrhea requires a careful history, with particular emphasis on antibiotic use during the preceding three months. The clinical presentation ranges from no symptoms to fulminant pseudomembranous colitis. A detailed description of the patients diarrhea, including color, consistency, and frequency, is important in differentiating other causes of diarrhea from C. difficile associated diarrhea. […] The most common laboratory test for diagnosing C. difficile mediated disease is an enzyme immunoassay that detects toxins A and B. This test provides results within two to six hours and has a specificity of 93 to 100 percent. The sensitivity is 63 to 99 percent, which means that false-negative results can occur. […] The gold standard for the diagnosis of C. difficile mediated disease is a cytotoxin assay. Although this test is highly sensitive and specific, it is difficult to perform, and results are not available for 24 to 48 hours.

• #44 Clostridium difficile–Associated Diarrhea | AAFP

  https://www.aafp.org/pubs/afp/issues/2005/0301/p921.html

  Clostridium difficile infection is responsible for approximately 3 million cases of diarrhea and colitis annually in the United States. Early diagnosis and prompt aggressive treatment are critical in managing C. difficile associated diarrhea. The most common confirmatory study is an enzyme immunoassay for C. difficile toxins A and B. The test is easy to perform, and results are available in two to four hours. Specificity of the assay is high (93 to 100 percent), but sensitivity ranges from 63 to 99 percent. In severe cases, flexible sigmoidoscopy can provide an immediate diagnosis. […] Family physicians should stress preventive measures for C. difficile associated diarrhea (especially the judicious use of antibiotics) and should maintain a high index of suspicion for C. difficile infection in their patients.

• #45 Clostridium difficile – associated diarrhoea

  https://www.health.vic.gov.au/infectious-diseases/clostridium-difficile-associated-diarrhoea

  C. difficileassociated diarrhoea (CDAD) generally presents as antibiotic-associated colitis, with diarrhoea, abdominal cramping, fever and elevated white cell count, during or following antibiotic use. […] Diagnosis relies on analysis of fresh unformed stool for C. difficile toxin. Clostridium-specific glutamate dehydrogenase (GDH) in stool is an indicative screening test, but will also be present in the context of colonisation with a non-pathogenic strain. The organism may also be cultured from stool. […] As the disease is most frequently associated with antibiotic use, the avoidance of unnecessary antibiotics or the use of the narrowest spectrum agent for the shortest period will help to minimise the risk of CDAD.

• #46 PCR Versus Cytotoxicity Assay for Diagnosis of Antibiotics Associated Diarrhea Caused by Clostridium difficile infection

  https://ejmm.journals.ekb.eg/article_249856.html

  Antibiotic Associated Diarrhea (AAD) is a common health problem in patients under antibiotic therapy. Clostridium difficile is the commonest cause of AAD. […] our study aimed to compare between cytotoxicity assay and PCR for the diagnosis of Clostridium difficile antibiotic associated diarrhea as regard specificity and sensitivity. […] Cytotoxicity test showed specificity 96% and sensitivity 90.5%. while PCR assay showed specificity 100% and sensitivity 98%. […] PCR is rapid, specific and sensitive in the diagnosis of C-difficile Antibiotic associated diarrhea.

• #47 Antibiotic-associated diarrhea: Clinical characteristics and the presence of Clostridium difficile | Revista de Gastroenterología de México

  https://www.revistagastroenterologiamexico.org/en-antibiotic-associated-diarrhea-clinical-characteristics-presence-articulo-S2255534X17300142

  There are numerous methods for diagnosing CD infection. Polymerase chain reaction (PCR) is a highly sensitive technique that utilizes DNA initiators to amplify two specific genes, different from the CD toxigenic strains: tcdB that encodes the B toxin and tcdC that encodes a regulatory pathway of the toxin. […] The aim of the present study was to describe the clinical characteristics of patients with AAD, as well as the first Latin American experience utilizing the PCR technique for determining the presence of CD in that group of patients. […] The present study is the first conducted on a Colombian population that describes the demographic characteristics, antibiotic management profiles, clinical manifestations, risk factors, and paraclinical reports in patients with AAD. […] CD infection was confirmed by PCR in 6 of the 43 cases (13.9%), close to the 15% reported in a larger case series by Kyne et al., and the 15-25% of CD infection described by other authors. […] Finally, it is worth emphasizing that only 15% of the patients with AAD were positive for CD infection in the PCR test, making it very important to consider other causes of diarrhea in the hospitalized patient.

• #48 Post-Travel Diarrhea | Yellow Book | CDC

  https://www.cdc.gov/yellow-book/hcp/post-travel-evaluation/post-travel-diarrhea.html

  Diagnostic tests to determine specific microbial etiologies in cases of post-travel diarrhea have advanced in the past number of years. While culture, microscopy, and antigen detection have been the mainstay of diagnostics, PCR-based diagnostics (including as part of multiplex panels, which uses a single stool specimen to detect multiple enteropathogens simultaneously) are becoming increasingly available for detection of bacterial, viral, fungal, and protozoal pathogens. While these assays have high sensitivity and specificity, the clinical utility and economic impact of these diagnostic molecular panels have not been determined fully. In some cases, molecular testing detects colonization rather than infection, potentially making it difficult for healthcare professionals to interpret and apply the results properly. For persistent diarrhea, the use of a protozoa-dedicated multiplex panel would be most appropriate because bacteria and viruses are unlikely causes.

• #49 Clostridium difficile–Associated Diarrhea | AAFP

  https://www.aafp.org/pubs/afp/issues/2005/0301/p921.html

  The diagnosis of C. difficile associated diarrhea requires a careful history, with particular emphasis on antibiotic use during the preceding three months. The clinical presentation ranges from no symptoms to fulminant pseudomembranous colitis. A detailed description of the patients diarrhea, including color, consistency, and frequency, is important in differentiating other causes of diarrhea from C. difficile associated diarrhea. […] The most common laboratory test for diagnosing C. difficile mediated disease is an enzyme immunoassay that detects toxins A and B. This test provides results within two to six hours and has a specificity of 93 to 100 percent. The sensitivity is 63 to 99 percent, which means that false-negative results can occur. […] The gold standard for the diagnosis of C. difficile mediated disease is a cytotoxin assay. Although this test is highly sensitive and specific, it is difficult to perform, and results are not available for 24 to 48 hours.

• #50

  https://link.springer.com/article/10.1007/s11894-002-0077-0

  Clostridium difficile, a spore-forming toxigenic bacterium, is one of the most common causes of infectious diarrhea and colitis in the United States. The mainstay of diagnosis is detection of C. difficile toxin A, toxin B, or both with a cytotoxin test or enzyme immunoassay of the stool of patients who have received antibiotic therapy and have features of C. difficile-associated diarrhea. Enzyme immunoassays that detect both toxins are preferred because of their higher diagnostic accuracy. If the first assay is negative and C. difficile-associated diarrhea is strongly suspected, a second assay may be performed. […] A comprehensive review of the epidemiology, pathogenesis, clinical features, diagnosis, treatment, and prevention of C. difficile-associated diarrhea. […] This publication offers evidence-based guidelines for infectious diarrhea from the Infectious Diseases Society of America. Algorithms are presented for the diagnostic evaluation and treatment of diarrhea with various infectious causes, including C. difficile, in inpatients and outpatients. […] Usefulness of simultaneous detection of toxin A and glutamate dehydrogenase for the diagnosis of Clostridium difficile-associated disease.

• #51

  https://pmc.ncbi.nlm.nih.gov/articles/PMC6334067/

  Antibiotic-associated diarrhoea is among the most common adverse events related to antibiotic use. […] Typical laboratory tests for the presence of C difficile do not have high sensitivity and specificity in isolation, so a combination of tests should be used when making the diagnosis of CDI. […] Diagnosis of CDI may be difficult for several reasons. First, the currently available tests lack ideal sensitivity and specificity. Second, C difficile may either cause asymptomatic colonisation or active gastrointestinal infection, and conventional tests do not clearly differentiate between these two states. Therefore, guidelines recommend testing for CDI only when a patient has diarrhoea and grounds for suspecting an infective aetiology. […] Given the variability of the sensitivity and specificity of these tests, a two-stage testing algorithm is widely applied. In the UK, toxin A/B enzyme immunoassay (EIA) testing is often used after an initial glutamate dehydrogenase (GDH) or polymerase chain reaction (PCR) screen. […] Where clinicians have a strong clinical suspicion of CDI, empirical therapy should be considered regardless of the laboratory result; this is because with a high pre-test probability, the negative predictive value of the tests that are currently available is insufficient to exclude disease.

• #52 Biliary Tract Disorders, Gallbladder Disorders, & Gallstone Pancreatitis | ACG

  https://gi.org/topics/c-difficile-infection/

  Diarrhea is a frequent side effect of antibiotics, occurring 10–20% of the time. It usually gets better when the antibiotics are stopped. Clostridium difficile infection (CDI) is due to a toxin-producing bacteria that causes a more severe form of antibiotic associated diarrhea. […] The diagnosis of C. difficile should be considered in patients with new and unexplained diarrhea occurring more than 3 times per day. The diagnosis is confirmed based on stool testing. There are several stool tests that can be used to diagnose C. difficile infections. The following 3 tests are commonly used: GDH, Toxin EIA and Toxin B PCR. It is now recommended that a 2 step testing algorithm be used to confirm the diagnosis of C. difficile, where GDH or Toxin B PCR is used as a screening test and the Toxin EIA is used to confirm the diagnosis. Your physician can order these tests at most commercial labs.

• #53 Australasian Society for Infectious Diseases guidelines for the diagnosis and treatment of Clostridium difficile infection | The Medical Journal of Australia

  https://www.mja.com.au/journal/2011/194/7/australasian-society-infectious-diseases-guidelines-diagnosis-and-treatment

  Testing should only be performed on unformed (liquid) stools, because a positive result in a formed stool only signifies colonisation. […] Assays that are available to diagnose CDI fall into five groups. […] The detection of C. difficile toxin in a cell-based cytotoxic assay (CCA) or toxigenic culture of C. difficile obtained from stool are generally regarded as the gold standards for diagnosis. […] EIA for C. difficile GDH (or common antigen) may be used as a screening test. […] PCR-based assays for detection of genes encoding toxin B (tcdB) are commercially available, as are in-house assays targeting various targets within the pathogenicity locus of C. difficile, which includes genes tcdA and tcdB, and adjacent accessory genes tcdC, tcdR and tcdE. […] The optimal diagnostic algorithm (for sensitivity and cost) is controversial, but likely to evolve as better, more cost-effective tests become available.

• #54

  https://pmc.ncbi.nlm.nih.gov/articles/PMC6334067/

  Antibiotic-associated diarrhoea is among the most common adverse events related to antibiotic use. […] Typical laboratory tests for the presence of C difficile do not have high sensitivity and specificity in isolation, so a combination of tests should be used when making the diagnosis of CDI. […] Diagnosis of CDI may be difficult for several reasons. First, the currently available tests lack ideal sensitivity and specificity. Second, C difficile may either cause asymptomatic colonisation or active gastrointestinal infection, and conventional tests do not clearly differentiate between these two states. Therefore, guidelines recommend testing for CDI only when a patient has diarrhoea and grounds for suspecting an infective aetiology. […] Given the variability of the sensitivity and specificity of these tests, a two-stage testing algorithm is widely applied. In the UK, toxin A/B enzyme immunoassay (EIA) testing is often used after an initial glutamate dehydrogenase (GDH) or polymerase chain reaction (PCR) screen. […] Where clinicians have a strong clinical suspicion of CDI, empirical therapy should be considered regardless of the laboratory result; this is because with a high pre-test probability, the negative predictive value of the tests that are currently available is insufficient to exclude disease.

• #55 Clostridium difficile–Associated Diarrhea | AAFP

  https://www.aafp.org/pubs/afp/issues/2005/0301/p921.html

  An important indicator of impending fulminant colitis is a sudden rise in the peripheral WBC count to between 30,000 and 50,000 per mm3 (30 to 50 10^9 per L), often accompanied by significant bandemia. […] In patients with fulminant C. difficile associated diarrhea, flexible sigmoidoscopy can provide an immediate diagnosis. The finding of pseudomembranes is pathognomonic for C. difficile colitis. CT scanning also can diagnose fulminant disease quickly. When considered with the clinical history, the presence of ascites, colon wall thickening, or dilation can help categorize the severity of the colitis.

• #56 Antibiotic-Associated Diarrhea Beyond C. Difficile: A Scoping Review | Published in Journal of Brown Hospital Medicine

  https://bhm.scholasticahq.com/article/39745

  The likely pathogenesis of AAD includes alteration of intestinal microbiota, direct drug toxicity on the gut and development of a superinfection by a pathogenic microbe. Identifying the etiology and understanding the pathogenesis of AAD will help in improving healthcare and in reducing the economic burden. […] It is essential to rule out other causes of AAD such as infection. For CDI, the diagnosis is commonly made by detection of Clostridioides difficile toxins by enzyme linked immunoassay (EIA) or using DNA based tests that identify the microbial toxin genes in unformed stool. Stool cultures may be sent to rule out other pathogens, if clinically indicated. […] Endoscopy is indicated if patient has typical CDI presentation with negative Clostridioides difficile test results, there is no response to standard course of antibiotics, patient has overlapping inflammatory bowel disease or when an alternative diagnosis is suspected, and direct visualization and/or biopsy of the bowel mucosa is needed.

• #57 Clostridium difficile–Associated Diarrhea | AAFP

  https://www.aafp.org/pubs/afp/issues/2005/0301/p921.html

  The diagnosis of C. difficile associated diarrhea requires a careful history, with particular emphasis on antibiotic use during the preceding three months. The clinical presentation ranges from no symptoms to fulminant pseudomembranous colitis. A detailed description of the patients diarrhea, including color, consistency, and frequency, is important in differentiating other causes of diarrhea from C. difficile associated diarrhea. […] The most common laboratory test for diagnosing C. difficile mediated disease is an enzyme immunoassay that detects toxins A and B. This test provides results within two to six hours and has a specificity of 93 to 100 percent. The sensitivity is 63 to 99 percent, which means that false-negative results can occur. […] The gold standard for the diagnosis of C. difficile mediated disease is a cytotoxin assay. Although this test is highly sensitive and specific, it is difficult to perform, and results are not available for 24 to 48 hours.

• #58

  https://link.springer.com/article/10.1007/BF02237064

  PURPOSE: This review examines the pathogenesis, clinical manifestations, diagnosis, and current medical and operative strategies in the treatment of Clostridium difficile diarrhea and colitis. […] Diagnosis requires a high index of suspicion and depends on clinical data, laboratory stool studies (enzyme-linked immunoabsorbent assay and cytotoxin test), and endoscopy in selected cases. […] Standard laboratory studies and endoscopic evaluation assist in the diagnosis of clinically suspicious cases. […] Gerding DN. Diagnosis of Clostridium-difficile-associated disease: patient selection and test perfection. Am J Med 1996;100:4856. […] Seppala K, Hjelt L, Sipponen P. Colonoscopy in the diagnosis of antibiotic-associated colitis: a prospective study. Scand J Gastroenterol 1981;16:4658. […] Boland GW, Lee MJ, Cats AM, Gaa JA, Saini S, Mueller PR. Antibiotic-induced diarrhea: specificity of abdominal CT for the diagnosis of Clostridium difficile disease. Radiology 1994;191:1036.

• #59 Clostridium difficile–Associated Diarrhea | AAFP

  https://www.aafp.org/pubs/afp/issues/2005/0301/p921.html

  An important indicator of impending fulminant colitis is a sudden rise in the peripheral WBC count to between 30,000 and 50,000 per mm3 (30 to 50 10^9 per L), often accompanied by significant bandemia. […] In patients with fulminant C. difficile associated diarrhea, flexible sigmoidoscopy can provide an immediate diagnosis. The finding of pseudomembranes is pathognomonic for C. difficile colitis. CT scanning also can diagnose fulminant disease quickly. When considered with the clinical history, the presence of ascites, colon wall thickening, or dilation can help categorize the severity of the colitis.

• #60

  https://link.springer.com/article/10.1007/BF02237064

  PURPOSE: This review examines the pathogenesis, clinical manifestations, diagnosis, and current medical and operative strategies in the treatment of Clostridium difficile diarrhea and colitis. […] Diagnosis requires a high index of suspicion and depends on clinical data, laboratory stool studies (enzyme-linked immunoabsorbent assay and cytotoxin test), and endoscopy in selected cases. […] Standard laboratory studies and endoscopic evaluation assist in the diagnosis of clinically suspicious cases. […] Gerding DN. Diagnosis of Clostridium-difficile-associated disease: patient selection and test perfection. Am J Med 1996;100:4856. […] Seppala K, Hjelt L, Sipponen P. Colonoscopy in the diagnosis of antibiotic-associated colitis: a prospective study. Scand J Gastroenterol 1981;16:4658. […] Boland GW, Lee MJ, Cats AM, Gaa JA, Saini S, Mueller PR. Antibiotic-induced diarrhea: specificity of abdominal CT for the diagnosis of Clostridium difficile disease. Radiology 1994;191:1036.

• #61 Clostridium difficile–Associated Diarrhea | AAFP

  https://www.aafp.org/pubs/afp/issues/2005/0301/p921.html

  An important indicator of impending fulminant colitis is a sudden rise in the peripheral WBC count to between 30,000 and 50,000 per mm3 (30 to 50 10^9 per L), often accompanied by significant bandemia. […] In patients with fulminant C. difficile associated diarrhea, flexible sigmoidoscopy can provide an immediate diagnosis. The finding of pseudomembranes is pathognomonic for C. difficile colitis. CT scanning also can diagnose fulminant disease quickly. When considered with the clinical history, the presence of ascites, colon wall thickening, or dilation can help categorize the severity of the colitis.

• #62 Clostridium difficile–Associated Diarrhea | AAFP

  https://www.aafp.org/pubs/afp/issues/2005/0301/p921.html

  An important indicator of impending fulminant colitis is a sudden rise in the peripheral WBC count to between 30,000 and 50,000 per mm3 (30 to 50 10^9 per L), often accompanied by significant bandemia. […] In patients with fulminant C. difficile associated diarrhea, flexible sigmoidoscopy can provide an immediate diagnosis. The finding of pseudomembranes is pathognomonic for C. difficile colitis. CT scanning also can diagnose fulminant disease quickly. When considered with the clinical history, the presence of ascites, colon wall thickening, or dilation can help categorize the severity of the colitis.

• #63

  https://link.springer.com/article/10.1007/BF02237064

  PURPOSE: This review examines the pathogenesis, clinical manifestations, diagnosis, and current medical and operative strategies in the treatment of Clostridium difficile diarrhea and colitis. […] Diagnosis requires a high index of suspicion and depends on clinical data, laboratory stool studies (enzyme-linked immunoabsorbent assay and cytotoxin test), and endoscopy in selected cases. […] Standard laboratory studies and endoscopic evaluation assist in the diagnosis of clinically suspicious cases. […] Gerding DN. Diagnosis of Clostridium-difficile-associated disease: patient selection and test perfection. Am J Med 1996;100:4856. […] Seppala K, Hjelt L, Sipponen P. Colonoscopy in the diagnosis of antibiotic-associated colitis: a prospective study. Scand J Gastroenterol 1981;16:4658. […] Boland GW, Lee MJ, Cats AM, Gaa JA, Saini S, Mueller PR. Antibiotic-induced diarrhea: specificity of abdominal CT for the diagnosis of Clostridium difficile disease. Radiology 1994;191:1036.

• #64 Clostridium difficile–Associated Diarrhea | AAFP

  https://www.aafp.org/pubs/afp/issues/2005/0301/p921.html

  An important indicator of impending fulminant colitis is a sudden rise in the peripheral WBC count to between 30,000 and 50,000 per mm3 (30 to 50 10^9 per L), often accompanied by significant bandemia. […] In patients with fulminant C. difficile associated diarrhea, flexible sigmoidoscopy can provide an immediate diagnosis. The finding of pseudomembranes is pathognomonic for C. difficile colitis. CT scanning also can diagnose fulminant disease quickly. When considered with the clinical history, the presence of ascites, colon wall thickening, or dilation can help categorize the severity of the colitis.

• #65 Antibiotic-Associated Diarrhea – Canadian Digestive Health Foundation

  https://cdhf.ca/en/antibiotic-associated-diarrhea/

  Symptoms include: Fever, Abdominal pain or tenderness, Profuse watery diarrhea with mucus and/or blood, Dehydration – typical signs and symptoms include feeling tired and lightheaded, thirsty, passing dark coloured urine and less frequent urination, Nausea and loss of appetite (Lewis, 2022; Barbut & Meynard, 2002). […] However, in some cases your doctor may decide to stop the antibiotic until symptoms resolve. Your doctor may also order some tests to determine the cause of diarrhea and depending on the results and/or the severity of your symptoms you may require hospital admission. If C. diff is found to be the cause of AAD, another antibiotic may need to be prescribed for treatment (Kelly & Lamont, 2021; Giannelli 2017). […] Many studies have demonstrated that probiotics may help prevent or reduce the risk of antibiotic-associated diarrhea (Barbut & Meynard, 2002). […] It has been proven that Florastor probiotics reduces the incidence of antibiotic-associated diarrhea by up to 80% in children and up to 84% in adults (Kotowska et. Al, 2005).

• #66 Can Antibiotics Cause Diarrhea? Symptoms, Treatment, and Prevention Tips

  https://www.everydayhealth.com/digestive-health/can-antibiotics-cause-diarrhea/

  Symptoms of C. diff diarrhea include: Severe watery diarrhea, Abdominal cramps, Fever, Pus or blood in the stools, Low-grade fever, Nausea, Appetite loss. […] Mild diarrhea should clear up within a few days after you finish taking antibiotics. If it’s severe, your doctor might recommend stopping antibiotics until the diarrhea improves. C. diff diarrhea can take longer to clear up, and it may come back after you treat it. […] Call your doctor if you’ve been taking antibiotics and you have: More than five loose stools a day, A fever, Pain or tenderness in your belly, Blood or pus in your stool, Signs of dehydration, which include a very dry mouth, little or no urination, dizziness, or weakness. […] To manage severe diarrhea, stop taking the antibiotic that caused it. Your doctor may put you on an antibiotic like fidaxomicin (Dificid) or vancomycin (Firvanq) to treat a C. diff infection. In the rare but very serious situation when antibiotics don’t work and the infection becomes life-threatening, surgery may be performed to remove the affected portion of the colon.

• #67 Antibiotics Diarrhea: Causes, Treatment, and Prevention

  https://www.healthline.com/health/antibiotics-diarrhea

  If your diarrhea condition is milder, your doctor may suggest that you stop taking your antibiotic until your diarrhea goes away. Your doctor could also prescribe a different antibiotic that has a lower risk of causing diarrhea. […] In cases where C. diff infection is suspected, your doctor will take you off the antibiotic that youre on. Instead, your doctor may prescribe an antibiotic that targets C. diff bacteria, such as vancomycin, fidaxomicin, or metronidazole. […] There are some steps that you can take to lower your risk of developing antibiotic-associated diarrhea. Some suggestions include: Try probiotics. Probiotics can help add good bacteria back into your digestive system. […] Antibiotic-associated diarrhea is fairly common. It happens when antibiotics disturb the natural balance of bacteria in your intestines. This can lead to digestive irritation and increase the risk of illness due to some types of harmful bacteria, such as C. diff. […] All types of antibiotics have the potential to cause diarrhea. However, some types of antibiotics, such as penicillins and cephalosporins, can cause it more frequently.

• #68 Patient education: Antibiotic-associated diarrhea caused by Clostridioides difficile (Beyond the Basics) – UpToDate

  https://www.uptodate.com/contents/antibiotic-associated-diarrhea-caused-by-clostridioides-difficile-beyond-the-basics

  Antibiotic-associated diarrhea refers to diarrhea that develops in a person who is taking or recently took antibiotics. One of the most serious causes of antibiotic-associated diarrhea is infection with a bacterium called Clostridioides difficile. C. difficile infections are common, with approximately 500,000 cases per year in the United States. The diagnosis of C. difficile is based upon laboratory analysis of a stool sample to identify toxin-producing C. difficile or its toxins. […] The most important step in treatment of C. difficile is to stop the antibiotic that allowed the infection to develop. If an antibiotic is necessary to treat an ongoing infection, the health care provider may choose an antibiotic that is less likely to allow further growth of C. difficile, when possible.

• #69 Antibiotic-Associated Diarrhea – Harvard Health

  https://www.health.harvard.edu/a_to_z/antibiotic-associated-diarrhea-a-to-z

  In healthy people, many different species of bacteria live inside the bowel. […] This can change dramatically when a person begins treatment with an antibiotic. […] In most cases, the result is only a mild case of short-term diarrhea that goes away quickly after the antibiotic treatment ends. […] One type of bacteria in particular, a species called Clostridium difficile (C. difficile), can overgrow inside the bowel, producing irritating chemicals that damage the bowel wall and trigger bowel inflammation, called colitis. […] Because C. difficile lives silently in the bowels of about 5% of people, episodes of C. difficile diarrhea occasionally occur in otherwise healthy adults and children who are taking antibiotics. […] According to some studies, more than 20% of patients in hospitals and nursing homes silently harbor C. difficile in their intestines.

• #70 Managing antibiotic associated diarrhoea

  https://pmc.ncbi.nlm.nih.gov/articles/PMC1123310/

  Diarrhoea is a common adverse effect of antibiotic treatments. Antibiotic associated diarrhoea occurs in about 5-30% of patients either early during antibiotic therapy or up to two months after the end of the treatment. The frequency of antibiotic associated diarrhoea depends on the definition of diarrhoea, the inciting antimicrobial agents, and host factors. […] Clinical presentations of antibiotic associated diarrhoea range from mild diarrhoea to fulminant pseudomembranous colitis. The latter is characterised by a watery diarrhoea, fever (in 80% of cases), leucocytosis (80%), and the presence of pseudomembranes on endoscopic examination. […] In cases of severe or persistent antibiotic associated diarrhoea, the challenge is to identify C difficile associated infections since this is the most common identifiable and treatable pathogen. Diagnosis relies on detecting toxins A or B in stools. […] Treatment of C difficile related diarrhoea is based on oral metronidazole (250 mg four times daily) or oral vancomycin (125 mg four times daily) for 10 days. […] The key measure for preventing antibiotic associated diarrhoea, however, is to limit antibiotic use.

• #71 C. diff Infection: What It Is, Symptoms & Treatment

  https://my.clevelandclinic.org/health/diseases/15548-c-diff-infection

  If your healthcare provider suspects C. diff infection based on your symptoms, they’ll take a sample of your poop and send it to a lab. The lab will test it for C. diff toxins. […] If you test positive, your healthcare provider may conduct further tests to find out how severe the infection is. These may include blood tests and imaging tests that look inside your colon. […] Treatment for C. diff infection is based on how severe it is. If you developed a C. diff infection while taking antibiotics, your provider might begin by simply stopping those medications. […] For some people, this is enough. Their natural gut immunity returns and overcomes the infection. If this doesn’t happen, your provider will prescribe antibiotics that can stop C. diff. […] Antibiotics to treat C. diff include: Metronidazole, Vancomycin, Fidaxomicin.

• #72 C. diff Infection: What It Is, Symptoms & Treatment

  https://my.clevelandclinic.org/health/diseases/15548-c-diff-infection

  If your healthcare provider suspects C. diff infection based on your symptoms, they’ll take a sample of your poop and send it to a lab. The lab will test it for C. diff toxins. […] If you test positive, your healthcare provider may conduct further tests to find out how severe the infection is. These may include blood tests and imaging tests that look inside your colon. […] Treatment for C. diff infection is based on how severe it is. If you developed a C. diff infection while taking antibiotics, your provider might begin by simply stopping those medications. […] For some people, this is enough. Their natural gut immunity returns and overcomes the infection. If this doesn’t happen, your provider will prescribe antibiotics that can stop C. diff. […] Antibiotics to treat C. diff include: Metronidazole, Vancomycin, Fidaxomicin.

• #73 C. diff Infection: What It Is, Symptoms & Treatment

  https://my.clevelandclinic.org/health/diseases/15548-c-diff-infection

  If you have a mild infection, you’ll take the prescription home with you. Most people will start improving in a few days. If your infection is more severe, you might need to stay in the hospital. […] In the hospital, your provider might give you antibiotics through an IV, along with fluids to prevent dehydration. In some cases, they might deliver medications directly into your colon as an enema. […] If you have severe complications, you might need intensive care. In rare cases, providers recommend emergency surgery to remove the source of the infection in your colon. This is called colectomy. […] If you’ve recovered but you continue to have repeat infections after treatment, your options are: Repeat antibiotic therapy. Your provider may give you a different drug, or a longer prescription for the same drug. After antibiotics, your provider may recommend that you take probiotics to help restore your gut bacteria.

• #74 C. diff Infection: What It Is, Symptoms & Treatment

  https://my.clevelandclinic.org/health/diseases/15548-c-diff-infection

  Fecal microbiota transplant. When repeat antibiotic therapy fails, fecal transplantation has proved highly effective in preventing recurrent C. diff infection. Fecal transplantation involves transferring a poop sample from a healthy donor into a diseased colon. The sample will restore balance to your gut microbiome.

• #75 Can Antibiotics Cause Diarrhea? Symptoms, Treatment, and Prevention Tips

  https://www.everydayhealth.com/digestive-health/can-antibiotics-cause-diarrhea/

  Symptoms of C. diff diarrhea include: Severe watery diarrhea, Abdominal cramps, Fever, Pus or blood in the stools, Low-grade fever, Nausea, Appetite loss. […] Mild diarrhea should clear up within a few days after you finish taking antibiotics. If it’s severe, your doctor might recommend stopping antibiotics until the diarrhea improves. C. diff diarrhea can take longer to clear up, and it may come back after you treat it. […] Call your doctor if you’ve been taking antibiotics and you have: More than five loose stools a day, A fever, Pain or tenderness in your belly, Blood or pus in your stool, Signs of dehydration, which include a very dry mouth, little or no urination, dizziness, or weakness. […] To manage severe diarrhea, stop taking the antibiotic that caused it. Your doctor may put you on an antibiotic like fidaxomicin (Dificid) or vancomycin (Firvanq) to treat a C. diff infection. In the rare but very serious situation when antibiotics don’t work and the infection becomes life-threatening, surgery may be performed to remove the affected portion of the colon.

• #76 Clostridioides (Clostridium) Difficile Colitis: Background, Etiology, Pathophysiology

  https://emedicine.medscape.com/article/186458-overview

  Clostridioides difficile (formerly Clostridium difficile) is a gram-positive, anaerobic, spore-forming bacillus that is responsible for the development of antibiotic-associated diarrhea and colitis. C difficile colitis results from a disturbance of the normal bacterial flora of the colon, colonization by C difficile, and the release of toxins that cause mucosal inflammation and damage. […] The diagnosis of C difficile colitis should be suspected in any patient with diarrhea who has received antibiotics within the previous 3 months, has been recently hospitalized, and/or has an occurrence of diarrhea 48 hours or more after hospitalization. […] However, more recent studies have shown that C difficile can be the cause of diarrhea in community dwellers without previous hospitalization or antibiotic exposure; therefore, the diagnosis should be suspected in this population as well. […] Once infected with C difficile, the rate of disease recurrence is 20-40% when using metronidazole and vancomycin antibiotics as first-line therapy. […] Fidaxomicin is now recommended as first-line treatment due to a lower risk of CDI recurrence.

• #77 Patient education: Antibiotic-associated diarrhea caused by Clostridioides difficile (Beyond the Basics) – UpToDate

  https://www.uptodate.com/contents/antibiotic-associated-diarrhea-caused-by-clostridioides-difficile-beyond-the-basics/print

  Recurrence occurs in up to 25 percent of people. In some cases, the recurrence is caused by the original infecting strain („relapse”) and in others by new infection with a different strain of C. difficile („reinfection”). […] Treatment of recurrent C. difficile infection includes treatment with an oral antibiotic regimen (10- to 14-day course) or longer treatment with an oral antibiotic that is slowly tapered over several weeks. […] C. difficile infection rarely spreads from one family member to another, unlike other forms of enteric infection that are quite contagious (such as norovirus or Salmonella infections). […] Hand washing is an effective way to prevent the spread of C. difficile.

• #78 Patient education: Antibiotic-associated diarrhea caused by Clostridioides difficile (Beyond the Basics) – UpToDate

  https://www.uptodate.com/contents/antibiotic-associated-diarrhea-caused-by-clostridioides-difficile-beyond-the-basics/print

  Antibiotic-associated diarrhea refers to diarrhea that develops in a person who is taking or recently took antibiotics. One of the most serious causes of antibiotic-associated diarrhea is infection with a bacterium called Clostridioides difficile. C. difficile infections are common, with approximately 500,000 cases per year in the United States. Infection is most common in people who are hospitalized, producing disease in more than 8 hospitalized patients per 1000 (0.9 percent) in 2008 in the United States. […] This topic review discusses the causes, symptoms, diagnosis, and treatment of C. difficile-associated diarrhea. […] The diagnosis of C. difficile is based upon laboratory analysis of a stool sample to identify toxin-producing C. difficile or its toxins. […] If symptoms return, it is important for a health care provider to confirm that C. difficile is the cause of the symptoms (rather than another condition).

• #79 C. diff: Facts for Clinicians | C. diff | CDC

  https://www.cdc.gov/c-diff/hcp/clinical-overview/index.html

  Clostridioides difficile (C. diff) is a common cause of antibiotic-associated diarrhea (AAD). It accounts for 15 to 25% of all events of AAD. […] Patients with CDI exhibit clinical symptoms and test positive for the C. diff organism or its toxin. […] If a patient has had three or more stools in 24 hours: Order a C. diff test if other etiologies of diarrhea such as stool softener or laxative were not used. […] In about 20% of patients, CDI will resolve within two to three days of discontinuing the antibiotic to which the patient was previously exposed. However, CDI should usually be treated with an appropriate course (about 10 days) of treatment, including oral vancomycin or fidaxomicin. After treatment, repeat C. diff testing is not recommended if the patient’s symptoms have resolved, as patients often remain colonized.

• #80 Antibiotic-associated diarrhea | Content for the lay public | Microbiota institute

  https://www.biocodexmicrobiotainstitute.com/en/antibiotic-associated-diarrhea

  In 10%-20% of cases the diarrhea results from an infection by Clostridioides difficile (C. difficile), a bacterium that can become pathogenic due to certain factors, such as antibiotic use, being older than 65 or being affected by certain associated conditions. The management of AAD depends on the symptoms and the pathogen (e.g. C. difficile). For mild to moderate diarrhea, treatment involves ending antibiotic use (or replacing the antibiotic with one less likely to cause diarrhea) to allow the microbiota to recover and the patient to rehydrate. […] Numerous studies have shown that probiotics may help reconstitute the gut microbiota, while some probiotics have proven effective in preventing and treating AAD. When taken during antibiotic treatment, other probiotics have been shown to reduce the risk of primary and secondary infection with C. difficile. Lastly, fecal microbiota transplantation is currently only used for the most serious infections, i.e. relapses of infections with C. difficile.

• #81 Antibiotics Diarrhea: Causes, Treatment, and Prevention

  https://www.healthline.com/health/antibiotics-diarrhea

  If your diarrhea condition is milder, your doctor may suggest that you stop taking your antibiotic until your diarrhea goes away. Your doctor could also prescribe a different antibiotic that has a lower risk of causing diarrhea. […] In cases where C. diff infection is suspected, your doctor will take you off the antibiotic that youre on. Instead, your doctor may prescribe an antibiotic that targets C. diff bacteria, such as vancomycin, fidaxomicin, or metronidazole. […] There are some steps that you can take to lower your risk of developing antibiotic-associated diarrhea. Some suggestions include: Try probiotics. Probiotics can help add good bacteria back into your digestive system. […] Antibiotic-associated diarrhea is fairly common. It happens when antibiotics disturb the natural balance of bacteria in your intestines. This can lead to digestive irritation and increase the risk of illness due to some types of harmful bacteria, such as C. diff. […] All types of antibiotics have the potential to cause diarrhea. However, some types of antibiotics, such as penicillins and cephalosporins, can cause it more frequently.

• #82 Antibiotic-Associated Diarrhea: Causes, Treatment, Prevention

  https://www.verywellhealth.com/antibiotics-and-diarrhea-1941560

  Antibiotic-associated diarrhea is more common when: […] If a C difficile infection is confirmed, the antibiotics metronidazole and vancomycin may be prescribed to kill the bacteria and restore the normal digestive flora. […] In 2011, the antibiotic Dificid (fidaxomicin) was approved by the U.S. Food and Drug Administration and is today considered the first-line treatment for C. difficile-associated diarrhea. […] According to a 2015 study from the University of Copenhagen, which analyzed 17 randomized controlled trials involving 3,631 adults, probiotic supplements halved the risk of antibiotic-associated diarrhea compared to no treatment at all (8.8% versus 17.7%). […] In 2020, the American Gastroenterology Association released a statement suggesting some adults and children on antibiotic treatment may benefit from taking a probiotic as a measure to help prevent infection with C. difficile bacteria.

• #83 Focus on antibiotic associated diarrhea (AAD) | Content for health professionals | Microbiota institute

  https://www.biocodexmicrobiotainstitute.com/en/pro/focus-antibiotic-associated-diarrhea-aad

  If the use of probiotics for preventing antibiotic-associated diarrhea (AAD) is considered because of the existence of risk factors such as class of antibiotic(s), duration of antibiotic treatment, age, need for hospitalization, comorbidities, or previous episodes of AAD, healthcare professionals may recommend high doses (5 billion CFU/day) of S. boulardii or L. rhamnosus GG started simultaneously with antibiotic treatment to prevent AAD in outpatients and hospitalized children (certainty of evidence: moderate; grade of recommendation: strong). […] AAD can take anywhere from 2 hours to 8-10 weeks to develop after antibiotic use. […] Antibiotic Associated Diarrhea (AAD) is a common side effect of antibiotics. Age, spectrum of antibiotics used, underlying illness and recent surgery have been identified as risk factors. Recent evidence shows a new one: composition of the microbiota. In patients treated with -lactams, higher relative abundances of Bacteroides were inversely associated with AAD while higher baseline abundance of Bifidobacterium species and Lachnospiraceae and amino acid biosynthesis pathways (AABP) were associated with AAD. Relative abundances of potentially protective taxa and levels AABP may distinguish children who did and did not experience AAD. Further studies are needed to investigate whether similar trends are observed across different antibiotic types. The identified potentially protective taxa may inform the development of preventive approaches for AAD.

• #84 Antibiotic-Associated Diarrhea – Canadian Digestive Health Foundation

  https://cdhf.ca/en/antibiotic-associated-diarrhea/

  Symptoms include: Fever, Abdominal pain or tenderness, Profuse watery diarrhea with mucus and/or blood, Dehydration – typical signs and symptoms include feeling tired and lightheaded, thirsty, passing dark coloured urine and less frequent urination, Nausea and loss of appetite (Lewis, 2022; Barbut & Meynard, 2002). […] However, in some cases your doctor may decide to stop the antibiotic until symptoms resolve. Your doctor may also order some tests to determine the cause of diarrhea and depending on the results and/or the severity of your symptoms you may require hospital admission. If C. diff is found to be the cause of AAD, another antibiotic may need to be prescribed for treatment (Kelly & Lamont, 2021; Giannelli 2017). […] Many studies have demonstrated that probiotics may help prevent or reduce the risk of antibiotic-associated diarrhea (Barbut & Meynard, 2002). […] It has been proven that Florastor probiotics reduces the incidence of antibiotic-associated diarrhea by up to 80% in children and up to 84% in adults (Kotowska et. Al, 2005).

• #85 Antibiotic-Associated Diarrhea: Causes, Treatment, Prevention

  https://www.verywellhealth.com/antibiotics-and-diarrhea-1941560

  Antibiotic-associated diarrhea is more common when: […] If a C difficile infection is confirmed, the antibiotics metronidazole and vancomycin may be prescribed to kill the bacteria and restore the normal digestive flora. […] In 2011, the antibiotic Dificid (fidaxomicin) was approved by the U.S. Food and Drug Administration and is today considered the first-line treatment for C. difficile-associated diarrhea. […] According to a 2015 study from the University of Copenhagen, which analyzed 17 randomized controlled trials involving 3,631 adults, probiotic supplements halved the risk of antibiotic-associated diarrhea compared to no treatment at all (8.8% versus 17.7%). […] In 2020, the American Gastroenterology Association released a statement suggesting some adults and children on antibiotic treatment may benefit from taking a probiotic as a measure to help prevent infection with C. difficile bacteria.

• #86 Focus on antibiotic associated diarrhea (AAD) | Content for health professionals | Microbiota institute

  https://www.biocodexmicrobiotainstitute.com/en/pro/focus-antibiotic-associated-diarrhea-aad

  If the use of probiotics for preventing antibiotic-associated diarrhea (AAD) is considered because of the existence of risk factors such as class of antibiotic(s), duration of antibiotic treatment, age, need for hospitalization, comorbidities, or previous episodes of AAD, healthcare professionals may recommend high doses (5 billion CFU/day) of S. boulardii or L. rhamnosus GG started simultaneously with antibiotic treatment to prevent AAD in outpatients and hospitalized children (certainty of evidence: moderate; grade of recommendation: strong). […] AAD can take anywhere from 2 hours to 8-10 weeks to develop after antibiotic use. […] Antibiotic Associated Diarrhea (AAD) is a common side effect of antibiotics. Age, spectrum of antibiotics used, underlying illness and recent surgery have been identified as risk factors. Recent evidence shows a new one: composition of the microbiota. In patients treated with -lactams, higher relative abundances of Bacteroides were inversely associated with AAD while higher baseline abundance of Bifidobacterium species and Lachnospiraceae and amino acid biosynthesis pathways (AABP) were associated with AAD. Relative abundances of potentially protective taxa and levels AABP may distinguish children who did and did not experience AAD. Further studies are needed to investigate whether similar trends are observed across different antibiotic types. The identified potentially protective taxa may inform the development of preventive approaches for AAD.

• #87 Focus on antibiotic associated diarrhea (AAD) | Content for health professionals | Microbiota institute

  https://www.biocodexmicrobiotainstitute.com/en/pro/focus-antibiotic-associated-diarrhea-aad

  If the use of probiotics for preventing antibiotic-associated diarrhea (AAD) is considered because of the existence of risk factors such as class of antibiotic(s), duration of antibiotic treatment, age, need for hospitalization, comorbidities, or previous episodes of AAD, healthcare professionals may recommend high doses (5 billion CFU/day) of S. boulardii or L. rhamnosus GG started simultaneously with antibiotic treatment to prevent AAD in outpatients and hospitalized children (certainty of evidence: moderate; grade of recommendation: strong). […] AAD can take anywhere from 2 hours to 8-10 weeks to develop after antibiotic use. […] Antibiotic Associated Diarrhea (AAD) is a common side effect of antibiotics. Age, spectrum of antibiotics used, underlying illness and recent surgery have been identified as risk factors. Recent evidence shows a new one: composition of the microbiota. In patients treated with -lactams, higher relative abundances of Bacteroides were inversely associated with AAD while higher baseline abundance of Bifidobacterium species and Lachnospiraceae and amino acid biosynthesis pathways (AABP) were associated with AAD. Relative abundances of potentially protective taxa and levels AABP may distinguish children who did and did not experience AAD. Further studies are needed to investigate whether similar trends are observed across different antibiotic types. The identified potentially protective taxa may inform the development of preventive approaches for AAD.

• #88 Study sheds light on antibiotics-associated diarrhea | MIT News | Massachusetts Institute of Technology

  https://news.mit.edu/2022/study-sheds-light-antibiotics-associated-diarrhea-0228

  Results showed that Ruminococcaceae levels in the stools of study volunteers who developed diarrhea were significantly lower when compared to those who did not, both before and during treatment with amoxicillin-clavulanate. This suggests that individuals may, depending on their gut composition, be predisposed to antibiotic-associated diarrhea. […] The team further devised a simple polymerase chain reaction test based on levels of Faecalibacterium prausnitzii, a species within the Ruminococcaceae family, that could potentially be used in clinical settings to quickly determine an individuals risk of developing diarrhea with amoxicillin-clavulanate treatment. […] Understanding this response and the ability to predict those at risk will help guide the development of point-of-care diagnostics, says Eric J. Alm, professor of biological engineering at MIT, principal investigator at SMART Antimicrobial Resistance (AMR) interdisciplinary research group, and co-corresponding author of the study.

• #89 Study sheds light on antibiotics-associated diarrhea | MIT News | Massachusetts Institute of Technology

  https://news.mit.edu/2022/study-sheds-light-antibiotics-associated-diarrhea-0228

  Our findings provide evidence that an individuals gut microbial composition can influence the risk of developing antibiotics-associated diarrhea. […] The study provides a framework to identify other potential causes of antibiotic-associated diarrhea in relation to other classes of antibiotics, adds Alm.

• #90 Post-Travel Diarrhea | Yellow Book | CDC

  https://www.cdc.gov/yellow-book/hcp/post-travel-evaluation/post-travel-diarrhea.html

  Diagnostic tests to determine specific microbial etiologies in cases of post-travel diarrhea have advanced in the past number of years. While culture, microscopy, and antigen detection have been the mainstay of diagnostics, PCR-based diagnostics (including as part of multiplex panels, which uses a single stool specimen to detect multiple enteropathogens simultaneously) are becoming increasingly available for detection of bacterial, viral, fungal, and protozoal pathogens. While these assays have high sensitivity and specificity, the clinical utility and economic impact of these diagnostic molecular panels have not been determined fully. In some cases, molecular testing detects colonization rather than infection, potentially making it difficult for healthcare professionals to interpret and apply the results properly. For persistent diarrhea, the use of a protozoa-dedicated multiplex panel would be most appropriate because bacteria and viruses are unlikely causes.

• #91 A worldwide systematic review and meta-analysis of bacteria related to antibiotic-associated diarrhea in hospitalized patients | PLOS One

  https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0260667

  Antibiotic-associated diarrhea (AAD) is a major hospital problem and a common adverse effect of antibiotic treatment. The aim of this study was to investigate the prevalence of the most important bacteria that cause AAD in hospitalized patients. […] The results of this study emphasize the need for a surveillance program, as well as timely public and hospital health measures in order to control and treat AAD infections. […] Accurate and on-time diagnosis of AAD-related bacteria assists in controlling of C. difficile transmission in communities and medical centers, as well as reducing the prevalence of AAD. There are several methods for identifying C. difficile AAD or their toxins, among them culture and ELISA are used mostly. These techniques were also the most frequent methods used in our included studies. More studies are needed to compare different techniques of detection of AAD-causing bacteria.

• #92 Antibiotic-associated diarrhea: Clinical characteristics and the presence of Clostridium difficile | Revista de Gastroenterología de México

  https://www.revistagastroenterologiamexico.org/en-antibiotic-associated-diarrhea-clinical-characteristics-presence-articulo-S2255534X17300142

  There are numerous methods for diagnosing CD infection. Polymerase chain reaction (PCR) is a highly sensitive technique that utilizes DNA initiators to amplify two specific genes, different from the CD toxigenic strains: tcdB that encodes the B toxin and tcdC that encodes a regulatory pathway of the toxin. […] The aim of the present study was to describe the clinical characteristics of patients with AAD, as well as the first Latin American experience utilizing the PCR technique for determining the presence of CD in that group of patients. […] The present study is the first conducted on a Colombian population that describes the demographic characteristics, antibiotic management profiles, clinical manifestations, risk factors, and paraclinical reports in patients with AAD. […] CD infection was confirmed by PCR in 6 of the 43 cases (13.9%), close to the 15% reported in a larger case series by Kyne et al., and the 15-25% of CD infection described by other authors. […] Finally, it is worth emphasizing that only 15% of the patients with AAD were positive for CD infection in the PCR test, making it very important to consider other causes of diarrhea in the hospitalized patient.

• #93 Study sheds light on antibiotics-associated diarrhea | MIT News | Massachusetts Institute of Technology

  https://news.mit.edu/2022/study-sheds-light-antibiotics-associated-diarrhea-0228

  Results showed that Ruminococcaceae levels in the stools of study volunteers who developed diarrhea were significantly lower when compared to those who did not, both before and during treatment with amoxicillin-clavulanate. This suggests that individuals may, depending on their gut composition, be predisposed to antibiotic-associated diarrhea. […] The team further devised a simple polymerase chain reaction test based on levels of Faecalibacterium prausnitzii, a species within the Ruminococcaceae family, that could potentially be used in clinical settings to quickly determine an individuals risk of developing diarrhea with amoxicillin-clavulanate treatment. […] Understanding this response and the ability to predict those at risk will help guide the development of point-of-care diagnostics, says Eric J. Alm, professor of biological engineering at MIT, principal investigator at SMART Antimicrobial Resistance (AMR) interdisciplinary research group, and co-corresponding author of the study.

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