Materiały źródłowe

• #1 Staph infections – Diagnosis & treatment – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/staph-infections/diagnosis-treatment/drc-20356227

  To diagnose a staph infection, your health care provider typically will: […] Most often, providers diagnose staph infections by checking blood, urine, skin, infected material or nasal secretions for signs of the bacteria. Additional tests can help your provider choose the antibiotic that will work best against the bacteria. […] If you’re diagnosed with a staph infection, your provider may order an imaging test called an echocardiogram. This test can check if the infection has affected your heart. Your provider may order other imaging tests, depending on your symptoms and the exam results.

• #1 Staph Infection: Diagnosis & Treatment | NewYork-Presbyterian

  https://www.nyp.org/primary-care/staph-infection/treatment

  How is Staph Infection Diagnosed? Diagnosis Your primary care physician will determine if you have a staph infection by starting with a physical exam and asking about your symptoms. Many times, a doctor can see if you have a staph skin infection just by looking at it. […] The physician may order other exams to confirm a staph infection or to see how it affects other organs, such as the heart, lungs, or bones. Tests used to diagnose staph infection may include: A skin scraping, tissue sample, stool sample, or throat or nasal swabbing is to be tested for the presence of staphylococcus bacteria. Imaging tests such as an echocardiogram to diagnose endocarditis, which uses sound waves to see how your heart is pumping. […] A primary care physician can evaluate your symptoms and order any needed tests to make or confirm a diagnosis of staph infection.

• #1 Staphylococcus aureus Infections – Infections – Merck Manual Consumer Version

  https://www.merckmanuals.com/home/infections/bacterial-infections-gram-positive-bacteria/staphylococcus-aureus-infections

  The diagnosis is based on the appearance of the skin or identification of the bacteria in a sample of the infected material. […] Other infections require samples of blood or infected fluids, which are sent to a laboratory to grow (culture), identify, and test the bacteria. Laboratory results confirm the diagnosis and determine which antibiotics can kill the staphylococci (called susceptibility testing). […] If a doctor suspects osteomyelitis, x-rays, computed tomography (CT), magnetic resonance imaging (MRI), radionuclide bone scanning, or a combination is also done. These tests can show where the damage is and help determine how severe it is. […] Staphylococcal skin infections are usually diagnosed based on their appearance.

• #1 Staph Infections: Symptoms, Stages, Causes, Treatment, Contagiousness

  https://www.webmd.com/skin-problems-and-treatments/staph-infection-cellulitis

  A staph infection is caused by staphylococcus (or „staph”) bacteria. […] One type of staph infection that involves the skin is called cellulitis, and it affects the skin’s deeper layers. It is treatable with antibiotics. […] If your staph is resistant to the treatments you use, you may develop MRSA. MRSA is a significant concern in both community and health care settings, as it can cause serious and potentially life-threatening infections that are challenging to control. […] Staph cellulitis usually begins as a small area of tenderness, swelling, and redness. […] The signs of cellulitis are those of any inflammation: redness, warmth, swelling, and pain. […] Antibiotics are used to treat staph infections. […] In about 50% of cases, however, resistance is seen to even these stronger antibiotics.

• #1 Clinical approach to Staphylococcus aureus bacteremia in adults – UpToDate

  https://www.uptodate.com/contents/clinical-approach-to-staphylococcus-aureus-bacteremia-in-adults

  Clinical approach to Staphylococcus aureus bacteremia in adults […] Staphylococcus aureus is a leading cause of community-acquired and hospital-acquired bacteremia. Issues related to clinical manifestations of S. aureus infection are discussed separately. […] The clinical approach to S. aureus bacteremia consists of careful history and physical examination, infectious disease consultation, and diagnostic evaluation including echocardiography and additional imaging as needed. […] A careful history and physical examination is essential. For circumstances in which the source of bacteremia is uncertain, patients should be questioned carefully regarding potential portals of entry including recent skin or soft tissue infection and presence of indwelling prosthetic devices (including intravascular catheters, orthopedic hardware, and cardiac devices).

• #1 Diagnosis and Treatment of Staphylococcus aureus – MN Dept. of Health

  https://www.health.state.mn.us/diseases/staph/treat.html

  Definitive diagnosis of S. aureus infection is made by obtaining a culture from the area of suspected infection. […] Suspect diagnosis is based on patient symptoms and the health care providers evaluation. […] It is important to make sure that a culture from the infected area is obtained. […] Laboratories can test to find out which antibiotics will work to kill the bacteria. […] Testing the culture will ensure that the correct antibiotic is given for treatment of the infection.

• #1 Staphylococcus – Medical Microbiology – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK8448/

  Diagnosis is based on performing tests with colonies. Tests for clumping factor, coagulase, hemolysins and thermostable deoxyribonuclease are routinely used to identify S aureus. Commercial latex agglutination tests are available. Identification of S epidermidis is confirmed by commercial biotyping kits. […] The presence of staphylococci in a lesion might first be suspected after examination of a direct Gram stain. However, small numbers of bacteria in blood preclude microscopic examination and require culturing first. […] The organism is isolated by streaking material from the clinical specimen (or from a blood culture) onto solid media such as blood agar, tryptic soy agar or heart infusion agar. Specimens likely to be contaminated with other microorganisms can be plated on mannitol salt agar containing 7.5% sodium chloride, which allows the halo-tolerant staphylococci to grow. Ideally a Gram stain of the colony should be performed and tests made for catalase and coagulase production, allowing the coagulase-positive S aureus to be identified quickly. Another very useful test for S aureus is the production of thermostable deoxyribonuclease. S aureus can be confirmed by testing colonies for agglutination with latex particles coated with immunoglobulin G and fibrinogen which bind protein A and the clumping factor, respectively, on the bacterial cell surface. These are available from commercial suppliers (e.g., Staphaurex). The most recent latex test (Pastaurex) incorporates monoclonal antibodies to serotype 5 and 8 capsular polysaccharide in order to reduce the number of false negatives. (Some recent clinical isolates of S aureus lack production of coagulase and/or clumping factor, which can make identification difficult.) […] Nowadays, identification of S epidermidis and other species of Staphylococcus is performed using commercial biotype identification kits, such as API Staph Ident, API Staph-Trac, Vitek GPI Card and Microscan Pos Combo. These comprise preformed strips containing test substrates.

• #1 laboratory diagnosis of staphylococcus | PPT

  https://www.slideshare.net/slideshow/laboratory-diagnosis-of-staphylococcus/72294984

  Specimens are inoculated onto the suitable media. Plates incubated for 18-24 hour at 37C. On nutrient agar Colonies are golden yellow and opaque with smooth glistening surface, 2-4 mm in diameter, circular, convex, shiny easily emusifiable. (Most strains produce non diffusible Golden yellow pigment) […] Antibiotic sensitivity testing is important as staphylococci develop resistance to drugs readily. […] Antibiotic sensitivity test: A laboratory test which determines how effective antibiotic therapy is against a bacterial infections. Testing will assist the clinicians in the choice of drugs for the treatment of infections. […] MRSA Methicillin-resistant S. aureus. First reported in 1960s. […] Detection of MRSA MRSA is determined by disc diffusion test using cefoxitin (30g) disc on MHA with 2% NaCl 104 cfu/ml inoculum and incubated at 33-35C for 24 hour. As per CLSI guidelines inhibition zone of /= 21 mm was taken to be MRSA. […] Coagulase test Done to distinguish pathogenic strain (S.aureus) from non-pathogenic strains.

• #1 Staphylococcus aureus – Wikipedia

  https://en.wikipedia.org/wiki/Staphylococcus_aureus

  Depending upon the type of infection present, an appropriate specimen is obtained accordingly and sent to the laboratory for definitive identification by using biochemical or enzyme-based tests. A Gram stain is first performed to guide the way, which should show typical Gram-positive bacteria, cocci, in clusters. Second, the isolate is cultured on mannitol salt agar, which is a selective medium with 7.5% NaCl that allows S. aureus to grow, producing yellow-colored colonies as a result of mannitol fermentation and subsequent drop in the medium’s pH. […] Furthermore, for differentiation on the species level, catalase (positive for all Staphylococcus species), coagulase (fibrin clot formation, positive for S. aureus), DNAse (zone of clearance on DNase agar), lipase (a yellow color and rancid odor smell), and phosphatase (a pink color) tests are all done. For staphylococcal food poisoning, phage typing can be performed to determine whether the staphylococci recovered from the food were the source of infection.

• #1 Staphylococcal Infections – Infectious Diseases – Merck Manual Professional Edition

  https://www.merckmanuals.com/professional/infectious-diseases/gram-positive-cocci/staphylococcal-infections

  Diagnosis is by Gram stain and culture. […] Diagnosis of staphylococcal infections is by Gram stain and culture of infected material. […] Susceptibility tests should be done because methicillin-resistant organisms are now common and require alternative therapy. […] When staphylococcal scalded skin syndrome is suspected, cultures should be obtained from blood, urine, the nasopharynx, the umbilicus, abnormal skin, or any suspected focus of infection; the intact bullae are sterile. […] Although the diagnosis is usually clinical, a biopsy of the affected skin may help confirm the diagnosis. […] Staphylococcal food poisoning is usually suspected because of case clustering (eg, within a family, attendees of a social gathering, or customers of a restaurant). Confirmation (typically by the health department) entails isolating staphylococci from suspect food and sometimes testing for enterotoxins.

• #1 Lab diagnosis of staphylococcal infections deepa babin | PPT

  https://www.slideshare.net/slideshow/lab-diagnosis-of-staphylococcal-infections-deepa-babin/11037472

  Coagulase Negative Staphylococci Staphylococcus epidermidis Stitch abscess Infection associated with artificial implants and prosthetics, such as: Central venous line Intra ocular lens Ventriculo-peritoneal shunt Artificial heart valves (endocarditis) Artificial joints Staphylococcus saprophyticus Causes UTI in young adult females Resistant to Novobiocin (as opposed to Staphylococcus epidermidis, which is sensitive).

• #1 Staph Infection: Causes, Symptoms, Diagnosis & Treatment

  https://my.clevelandclinic.org/health/diseases/21165-staph-infection-staphylococcus-infection

  See your healthcare provider if you have any signs or symptoms of a staph infection. […] Healthcare providers prescribe antibiotics to treat staphylococcal infections. In severe cases, a staph infection can cause serious health complications and death. […] The way your provider determines if you have a staph infection depends on what area of the body is affected. Its easy to see staph infections on your skin. However, providers often rely on Gram stain testing and bacterial culture tests to diagnose the presence of bacteria and the type. […] If you have symptoms of a staph infection, contact your healthcare provider for diagnosis and treatment. […] Most cases of staph infection on the skin can be treated with a topical antibiotic (applied to your skin). […] Healthcare providers also prescribe oral antibiotics (taken by mouth) to treat staph infections inside your body and on your skin.

• #1 Staphylococcal Infections – Infectious Diseases – Merck Manual Professional Edition

  https://www.merckmanuals.com/professional/infectious-diseases/gram-positive-cocci/staphylococcal-infections

  In osteomyelitis, x-ray changes may not be apparent for 10 to 14 days, and bone rarefaction and periosteal reaction may not be detected for even longer. Abnormalities in MRI, CT, or radionuclide bone scans are often apparent earlier. Bone biopsy (open or percutaneous) should be done for pathogen identification and susceptibility testing. […] Some institutions that have a high incidence of methicillin-resistant S. aureus (MRSA) nosocomial infections routinely screen admitted patients for MRSA (active surveillance) by using rapid laboratory techniques to evaluate nasal swab specimens. […] Quick identification of MRSA does the following: Allows carriers to be placed in contact isolation and, when preoperative antibiotic prophylaxis against skin organisms is required, to be given vancomycin as part of their medication regimen. […] In patients with pneumonia, polymerase chain reaction (PCR) testing for MRSA colonization in the nares has been shown to have a negative predictive value of 95% for MRSA lung infection and may therefore be useful in antibiotic management.

• #1 MRSA infection – Diagnosis & treatment – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/mrsa/diagnosis-treatment/drc-20375340

  Doctors diagnose methicillin-resistant Staphylococcus aureus (MRSA) by checking a tissue sample or nasal secretions for signs of drug-resistant bacteria. The sample is sent to a lab where it’s placed in a dish of nutrients that encourage bacterial growth. […] But because it takes about 48 hours for the bacteria to grow, newer tests that can detect staph DNA in a matter of hours are now becoming more widely available. […] During your physical exam, your doctor will closely examine any skin cuts you may have. He or she might take a sample of tissue or liquid from the cuts for testing.

• #1 Azthena logo with the word Azthena

  https://www.news-medical.net/health/Staphylococcus-Aureus-Diagnosis.aspx

  Staphylococcus aureus can infect in a variety of ways leading to diverse manifestations. […] This makes diagnosis of S. aureus from an infection difficult. […] For diagnosis, an important first step is isolation of the bacteria from appropriate specimens. […] Steps in diagnosis of S. aureus infections include: […] To confirm a diagnosis, the sample from the patient is placed onto a culture media. […] These media are placed on petri dishes and swabbed with the sample. […] After a set period of time the typical golden colonies of S. aureus are seen. […] These are then stained with Gram stain for confirmation and also undergo specific characteristic tests like the catalase test or the coagulase test for diagnosis. […] These techniques include Real-time PCR and Quantitative PCR and are increasingly being employed in clinical laboratories. […] Toxins produced by S. aureus, such as enterotoxins A to D and TSST-1 may be identified using agglutination tests. […] These assay studies help determine the specific susceptibility to antibiotics of the infected strain.

• #1 Staphylococcal Infections: Practice Essentials, Background, Pathophysiology

  https://emedicine.medscape.com/article/228816-overview

  Staphylococcal infections usually are caused by Staphylococcus aureus (S aureus). However, the incidence of infections due to Staphylococcus epidermidis (S epidermidis) and other coagulase-negative staphylococci (CoNS) also has been steadily rising. […] Examination in patients with staphylococcal infections may include the following findings: […] Laboratory testing […] Complete blood count: Usually shows leukocytosis with a left shift (bands); may reveal thrombocytosis with chronic staphylococcal infection […] Blood cultures with susceptibilities, as appropriate for site of infection […] Peptide nucleic acid fluorescence in situ hybridization (PNA FISH): High sensitivity for S aureus (99.5%) and CoNS from positive blood cultures […] Screening tests for MRSA. […] Imaging studies

• #1 Staphylococcus aureus – Wikipedia

  https://en.wikipedia.org/wiki/Staphylococcus_aureus

  Diagnostic microbiology laboratories and reference laboratories are key for identifying outbreaks and new strains of S. aureus. Recent genetic advances have enabled reliable and rapid techniques for the identification and characterization of clinical isolates of S. aureus in real time. These tools support infection control strategies to limit bacterial spread and ensure the appropriate use of antibiotics. Quantitative PCR is increasingly being used to identify outbreaks of infection. […] When observing the evolvement of S. aureus and its ability to adapt to each modified antibiotic, two basic methods known as „band-based” or „sequence-based” are employed. Keeping these two methods in mind, other methods such as multilocus sequence typing (MLST), pulsed-field gel electrophoresis (PFGE), bacteriophage typing, spa locus typing, and SCCmec typing are often conducted more than others. With these methods, it can be determined where strains of MRSA originated and also where they are currently.

• #1 Current Limitations of Staph Infection Diagnostics, and the Role for VOCs in Achieving Culture-Independent Detection

  https://pmc.ncbi.nlm.nih.gov/articles/PMC9963134/

  Metabolomics-based diagnostics, whether through the analysis of blood, urine, saliva, or breath, address some of the common drawbacks of standard culture-based and molecular diagnostic approaches. The volatile organic compounds (VOCs) are a subset of metabolites that are low molecular-weight carbon-containing compounds, generally less than 300 amu, that readily evaporate at room temperature. Thus, VOCs can be used as culture-independent biomarkers to identify the infection etiology based on known volatile metabolome profiles for infections, eliminating the uncertainty of successful microbial growth and the lengthy time required for generating pure cultures. […] Breath tests have high sensitivity and specificity, especially when utilizing a profile of multiple VOCs as biomarkers for infection. VOCs can differentiate closely-related pathogens of the same genus and have the capacity to concomitantly reveal antibiotic sensitivity or resistance.

• #1 Clinical approach to Staphylococcus aureus bacteremia in adults – UpToDate

  https://www.uptodate.com/contents/clinical-approach-to-staphylococcus-aureus-bacteremia-in-adults

  Patients with S. aureus bacteremia should undergo echocardiography to evaluate for presence of endocarditis. […] Transthoracic echocardiography (TTE) is usually performed first; identification of a vegetation on TTE may obviate the need for transesophageal echocardiography (TEE), although TTE is not sufficient for ruling out infective endocarditis (IE). […] The results of echocardiography are useful even when the study is negative, as the absence of IE may impact decisions about the duration of antimicrobial therapy. […] The indications for TEE in patients with S. aureus bacteremia and no evidence of vegetation on TTE are controversial. TEE is substantially more sensitive than TTE for identification of valvular vegetation; it is most sensitive when performed five to seven days after the onset of bacteremia.

• #1 Clinical Practice Guidelines for the Diagnosis and Management of Skin and Soft Tissue Infections: 2014 Update by IDSA

  https://www.idsociety.org/practice-guideline/skin-and-soft-tissue-infections/

  In addition to infection, differential diagnosis of skin lesions should include drug eruption, cutaneous infiltration with the underlying malignancy, chemotherapy- or radiation-induced reactions, Sweet syndrome, erythema multiforme, leukocytoclastic vasculitis, and graft-vs-host disease among allogeneic transplant recipients (strong, high). […] Biopsy or aspiration of the lesion to obtain material for histological and microbiological evaluation should always be implemented as an early diagnostic step (strong, high).

• #1 Diagnosis of Brown Recluse Spider Bites Is Overused | AAFP

  https://www.aafp.org/pubs/afp/issues/2007/1001/p943.html

  Many patients currently present with a spider bite, but on investigation they have community-acquired methicillin-resistant Staphylococcus aureus (MRSA). […] A working diagnosis of spider bite or publishing a case history should be considered only when a spider is caught in the act of biting or otherwise reliably associated with a lesion. […] When cultured, my patients’ spider bites invariably grow out as MRSA. […] The incidence of community-acquired MRSA is on the rise in our community and in many others throughout the country; I urge providers to consider community-acquired MRSA, with its own diagnostic and treatment challenges, when presented with a purported spider bite. […] In addition, we are now experiencing an epidemic of skin lesions infected with community-acquired methicillin-resistant Staphylococcus aureus (MRSA), many of which may have originated in pruritic bites and stings, or in other puncture wounds that eventually necrose and can mimic necrotic arachnidism.

• #1 Methicillin-resistant Staphylococcus aureus (MRSA) – Symptoms, diagnosis and treatment | BMJ Best Practice

  https://bestpractice.bmj.com/topics/en-gb/910

  MRSA is an important cause of infection in both healthy people in the community and in patients in healthcare institutions. […] It is important to distinguish MRSA colonisation from infection. […] Healthcare-associated MRSA infections and community-associated MRSA infections exhibit important differences in antibiotic susceptibility. […] Community-associated MRSA most commonly results in skin and soft-tissue infections and therapy can often be with oral antibiotics. […] Healthcare-associated MRSA infections usually require treatment with intravenous antibiotics. […] Isolation of patients with MRSA, through contact precautions, may help to prevent spread of infection. […] Key diagnostic factors include presence of risk factors, erythematous skin lesions or pustules, irritation or pain at indwelling catheter site, and heart murmur and other signs of endocarditis.

• #1 Coagulase-Negative Staphylococcus – Infectious Disease Advisor

  https://www.infectiousdiseaseadvisor.com/ddi/coagulase-negative-staphylococcus/

  Coagulase-negative staphylococci (CoNS) species are skin commensal bacteria typically encountered in hospital settings. In the United States, they are the most common cause of health care-related infections. Coagulase-negative staphylococci typically causes infection when there is a foreign body such as a medical device or prosthetic in place. It is frequently resistant to methicillin and other antibiotics, which can make it challenging to manage. […] Staphylococcus epidermidis is the most common CoNS. Although it is not harmful on the surface of skin, when S. epidermidis is inadvertently introduced into the body via a medical device, prosthetic, or procedure, it can cause serious infection, particularly in patients who are immunocompromised, immunosuppressed, critically ill, or hospitalized long-term.

• #1 Coagulase-Negative Staphylococcus – Infectious Disease Advisor

  https://www.infectiousdiseaseadvisor.com/ddi/coagulase-negative-staphylococcus/

  Coagulase-negative staphylococci infection may not produce a fever or other signs of systemic infection. The signs and symptoms of CoNS infection vary based on the affected body part or system, as well as the surgical procedure, device, and technologies implicated in the infection. […] Because they are normal skin flora, CoNS are the most common blood culture contaminant. This makes it challenging to determine whether a positive CoNS culture indicates a true infection or merely contamination. Positive blood cultures that detect multiple CoNS strains are likely to be a result of contamination. In addition to assessing for the signs and symptoms of a CoNS infection, the diagnosis may be established by documenting more than 100 white blood cells/mL in dialysate fluid and recovering CoNS in fluid cultures. The time to blood culture positivity, quantitative blood cultures, and the presence of multiple positive cultures also can be used to help determine if a positive culture represents a true infection.

• #1 Coagulase-Negative Staphylococcus – Infectious Disease Advisor

  https://www.infectiousdiseaseadvisor.com/ddi/coagulase-negative-staphylococcus/

  Coagulase-negative staphylococci needs to be differentiated from positive staphylococci pathogens, primarily Staphylococcus aureus. Perhaps the greatest challenge in the differential diagnosis is to rule out contamination of blood cultures, particularly in patients with severe immunosuppression or who have prosthetic joints or indwelling medical devices. Proper blood collection procedures and rapid pathogen identification are crucial when evaluating a patient with suspected CoNS infection. […] According to the American Society of Microbiology, the coagulase test can be used to differentiates strains of S. aureus from S. epidermidis and other coagulase-negative species. The 2 types of coagulase tests are the slide test and the tube test; on each test, clumping or clots of any size indicate a positive response. While the slide test is simple and provides results within a few seconds, it is prone to false positives. The tube test is more definitive but can take up to 24 hours to provide results.

• #1 Clinical approach to Staphylococcus aureus bacteremia in adults – UpToDate

  https://www.uptodate.com/contents/clinical-approach-to-staphylococcus-aureus-bacteremia-in-adults

  Bedside infectious disease consultation is an important component of management for patients with S. aureus bacteremia and should occur whenever feasible, given the importance of serial examination to evaluate for metastatic infection and/or clues to the source of bacteremia. […] The diagnostic evaluation should include blood cultures, echocardiography, and additional imaging tailored to individual circumstances. […] Blood culture detection of Staphylococcus aureus should always be regarded as clinically significant, even if only a single positive blood culture bottle is observed. Identification of positive blood cultures should prompt initiation of empiric therapy as well as further clinical evaluation. […] Blood cultures should be drawn every 24 to 48 hours until clearance is demonstrated. Persistent S. aureus bacteremia despite appropriate antibiotic therapy is prognostically important.

• #1 Staphylococcal Scalded Skin Syndrome – Dermatologic Disorders – MSD Manual Professional Edition

  https://www.msdmanuals.com/professional/dermatologic-disorders/bacterial-skin-infections/staphylococcal-scalded-skin-syndrome

  Diagnosis of staphylococcal scalded skin syndrome is suspected clinically, but confirmation may require biopsy (frozen section may give earlier results). Specimens show noninflammatory superficial splitting of the epidermis. […] Cultures should be taken from the conjunctiva, nasopharynx, blood, urine, and areas of possible primary infection, such as the umbilicus in a neonate or suspect skin lesions. Cultures should not be taken from bullae because they are sterile, unlike in bullous impetigo, where cultures of the blister fluid yield a pathogen.

• #1

  http://www.bccdc.ca/health-info/diseases-conditions/staphylocococcus-aureus

  Staphylococcal food poisoning can be confirmed if the enterotoxin or large numbers of S. aureus are found in the food. S. aureus can also be detected in stool samples from patients. […] Illness caused by Staphylococcus aureus is an acute intoxication that develops after the ingestion of food contaminated with the enterotoxin produced by this bacterium. […] Control measures should be applied first to avoid contaminating the food with S. aureus and also to prevent growth and the formation of enterotoxin in the food.

• #1 Staph Infection: Causes, Symptoms, Diagnosis & Treatment

  https://my.clevelandclinic.org/health/diseases/21165-staph-infection-staphylococcus-infection

  If left untreated, staph infections can be deadly. […] Its important to seek medical help if you think you might have a staph infection. […] Most times, the outlook is favorable for people who have staph infections and are treated properly. […] Since a staph infection can become serious very quickly, you should contact your provider right away if you have signs of a staph infection. […] They arent different. MRSA stands for methicillin-resistant Staphylococcus aureus. MRSA is one type of staph infection, but its one that is harder to treat. […] Minor staph infections may clear up on their own, but its better not to rely on that happening. You should contact your provider because staph infections can get worse quickly and can be serious.

• #1 Staph infections – symptoms, causes, treatment and prevention | healthdirect

  https://www.healthdirect.gov.au/staph-infections

  Staphylococcus (staph) bacteria cause staph infections. […] Most staph skin infections are treated with antibiotic medicine. […] Some types of staph infection can be resistant to common antibiotics. This means the antibiotic doesn’t work to stop your infection. […] See your doctor if: you have an infection an area of red, hot, swollen, irritated or painful skin, or blisters filled with pus. […] Most staph skin infections are treated with antibiotic medicine. […] Serious infections need to be treated in hospital. […] The most common staph infection is caused by bacteria called Staph aureus. If these bacteria are resistant an antibiotic called methicillin they are called Methicillin-resistant Staphylococcus aureus (MRSA). […] As the normal antibiotics used to treat MRSA don’t work, an MRSA infection is harder to treat. […] Basic hygiene is the best way to avoid getting a staph skin infection. Always wash your hands well with soap and running water. […] Staph infections can sometimes cause serious infections like: septicaemia (blood poisoning).

• #1 Management of Staphylococcus aureus Infections | AAFP

  https://www.aafp.org/pubs/afp/issues/2005/1215/p2474.html

  Because of high incidence, morbidity, and antimicrobial resistance, Staphylococcus aureus infections are a growing concern for family physicians. Strains of S. aureus that are resistant to vancomycin are now recognized. Increasing incidence of unrecognized community-acquired methicillin-resistant S. aureus infections pose a high risk for morbidity and mortality. Although the incidence of complex S. aureus infections is rising, new antimicrobial agents, including daptomycin and linezolid, are available as treatment. S. aureus is a common pathogen in skin, soft-tissue, catheter-related, bone, joint, pulmonary, and central nervous system infections. S. aureus bacteremias are particularly problematic because of the high incidence of associated complicated infections, including infective endocarditis. Hospitalized patients with S. aureus infection have five times the risk of in-hospital mortality compared with inpatients without this infection.

• #1 UI researchers find method that could cut staph diagnosis from 2 days to 3 hours | Carver College of Medicine

  https://medicine.uiowa.edu/content/ui-researchers-find-method-could-cut-staph-diagnosis-2-days-3-hours

  Half a million people are infected with staph bacteria each year, leading to skin infections, as well as more dangerous and deadly diseases, especially when the infection enters the bloodstream. […] But diagnosing Staphylococcus aureus bacteremia (SAB) in the blood can take daysdoctors draw a blood sample for testing, and results arent generally available for 24 to 48 hours. […] Now, UI researchers have identified a procedure that may reduce the wait for diagnosing a staph infection from a few days to just three hours, as well as the amount of time patients may have to wait to determine their medicines efficacy. […] In their study, McNamara and his team show that by measuring micrococcal nuclease (MN), a specific enzyme secreted by staph, in a blood sample, doctors can detect and diagnose a staph infection within three hours.

• #1 Current Limitations of Staph Infection Diagnostics, and the Role for VOCs in Achieving Culture-Independent Detection

  https://pmc.ncbi.nlm.nih.gov/articles/PMC9963134/

  The field of VOC-based diagnostics is poised for rapid advancement toward clinical translation. Significant progress has been made in developing hardware for VOC collection and analysis, optimizing analytical methods for targeted and untargeted VOC measurements, standardizing processes, and determining the biological origins of VOC biomarkers.

• #1 UI researchers find method that could cut staph diagnosis from 2 days to 3 hours | Carver College of Medicine

  https://medicine.uiowa.edu/content/ui-researchers-find-method-could-cut-staph-diagnosis-2-days-3-hours

  Based on its fast turnaround time, this enzyme test may also enable doctors to monitor whether a prescribed antibiotic is doing what its supposed to be doing, and change medications if it isntall in the same day. […] When combined, these procedures provide a foundation for a faster and less expensive diagnosis.

• #1 Current Limitations of Staph Infection Diagnostics, and the Role for VOCs in Achieving Culture-Independent Detection

  https://pmc.ncbi.nlm.nih.gov/articles/PMC9963134/

  Vaccine development specific to S. aureus has been unsuccessful thus far, and therefore diagnosis and treatment of infections is the primary strategy for reducing morbidity and mortality caused by staph infections. Canonical diagnostic approaches in infectious disease have centered upon retrieval and characterization of the infectious agent through various culture-based methods. Once a specimen is obtained, identification of the infectious agent often begins with an enrichment culture in high-nutrient media to encourage amplification of the bacterial sample. […] Current diagnostic procedures for staph infections have several significant limitations that ultimately complicate effective identification and eradication. Obtaining a viable bacterial sample or bacterial genomes for in vitro identification remains a significant barrier in clinical diagnostics. The development of volatile organic compound (VOC) profiles for the detection and identification of pathogens is an area of intensive research, with significant efforts toward establishing breath tests for infections.

• #2 Diagnosing Staphylococcal Infections | NYU Langone Health

  https://nyulangone.org/conditions/staphylococcal-infections/diagnosis

  To diagnose a staphylococcal, or staph, infection, your NYU Langone doctor takes a medical history and performs a physical exam. During the exam, your doctor looks for skin lesions and other signs of infection. […] Your doctor may draw blood to find out if your white blood cells are elevated. High levels can be a sign that the immune system is fighting an infection. […] A test can also be used to determine whether you’re infected with methicillin-resistant Staphylococcus aureus (MRSA), a type of staph that’s resistant to common antibiotics. […] A doctor may take a sample of pus from a wound or tissue from the infected area and send it to a lab for testing. […] The doctor sends the sample to a lab, where a technician places it in a Petri dish, a round, shallow container with nutrients that encourage bacteria to grow over 24 to 48 hours. A test is used to tell the doctor which medications the organism is resistant to and which antibiotics would be most effective. It can help your doctor choose the medication best able to fight the staph infection.

• #2 Staphylococcal Infections: MedlinePlus

  https://medlineplus.gov/staphylococcalinfections.html

  Staph infections are diagnosed through a physical exam and by asking about symptoms. […] To check for other types of staph infections, providers may do a culture, with a skin scraping, tissue sample, stool sample, or throat or nasal swabs. […] There may be other tests, such as imaging tests, depending on the type of infection.

• #2 Clinical approach to Staphylococcus aureus bacteremia in adults – UpToDate

  https://www.uptodate.com/contents/clinical-approach-to-staphylococcus-aureus-bacteremia-in-adults

  Patients should also be questioned regarding symptoms that may reflect metastatic infection, which can occur in up to 40 percent of cases. These include bone or joint pain (particularly back pain, suggesting vertebral osteomyelitis, discitis, and/or epidural abscess), protracted fever and/or sweats (suggestive of endocarditis), abdominal pain (particularly left upper quadrant pain, which may reflect splenic infarction), costovertebral angle tenderness (which may reflect renal infarction or psoas abscess), and headache (which may reflect septic emboli). […] The physical examination should include careful cardiac examination for signs of new murmurs or heart failure. A vigorous search should be undertaken for the clinical stigmata of endocarditis, including evidence of small and large emboli with special attention to the fundi, conjunctivae, skin, and digits.

• #2 Staphylococcal Infections – Infectious Diseases – Merck Manual Professional Edition

  https://www.merckmanuals.com/professional/infectious-diseases/gram-positive-cocci/staphylococcal-infections

  Diagnosis is by Gram stain and culture. […] Diagnosis of staphylococcal infections is by Gram stain and culture of infected material. […] Susceptibility tests should be done because methicillin-resistant organisms are now common and require alternative therapy. […] When staphylococcal scalded skin syndrome is suspected, cultures should be obtained from blood, urine, the nasopharynx, the umbilicus, abnormal skin, or any suspected focus of infection; the intact bullae are sterile. […] Although the diagnosis is usually clinical, a biopsy of the affected skin may help confirm the diagnosis. […] Staphylococcal food poisoning is usually suspected because of case clustering (eg, within a family, attendees of a social gathering, or customers of a restaurant). Confirmation (typically by the health department) entails isolating staphylococci from suspect food and sometimes testing for enterotoxins.

• #2 Staphylococcus aureus – Wikipedia

  https://en.wikipedia.org/wiki/Staphylococcus_aureus

  Depending upon the type of infection present, an appropriate specimen is obtained accordingly and sent to the laboratory for definitive identification by using biochemical or enzyme-based tests. A Gram stain is first performed to guide the way, which should show typical Gram-positive bacteria, cocci, in clusters. Second, the isolate is cultured on mannitol salt agar, which is a selective medium with 7.5% NaCl that allows S. aureus to grow, producing yellow-colored colonies as a result of mannitol fermentation and subsequent drop in the medium’s pH. […] Furthermore, for differentiation on the species level, catalase (positive for all Staphylococcus species), coagulase (fibrin clot formation, positive for S. aureus), DNAse (zone of clearance on DNase agar), lipase (a yellow color and rancid odor smell), and phosphatase (a pink color) tests are all done. For staphylococcal food poisoning, phage typing can be performed to determine whether the staphylococci recovered from the food were the source of infection.

• #2 Staphylococcus – Medical Microbiology – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK8448/

  Diagnosis is based on performing tests with colonies. Tests for clumping factor, coagulase, hemolysins and thermostable deoxyribonuclease are routinely used to identify S aureus. Commercial latex agglutination tests are available. Identification of S epidermidis is confirmed by commercial biotyping kits. […] The presence of staphylococci in a lesion might first be suspected after examination of a direct Gram stain. However, small numbers of bacteria in blood preclude microscopic examination and require culturing first. […] The organism is isolated by streaking material from the clinical specimen (or from a blood culture) onto solid media such as blood agar, tryptic soy agar or heart infusion agar. Specimens likely to be contaminated with other microorganisms can be plated on mannitol salt agar containing 7.5% sodium chloride, which allows the halo-tolerant staphylococci to grow. Ideally a Gram stain of the colony should be performed and tests made for catalase and coagulase production, allowing the coagulase-positive S aureus to be identified quickly. Another very useful test for S aureus is the production of thermostable deoxyribonuclease. S aureus can be confirmed by testing colonies for agglutination with latex particles coated with immunoglobulin G and fibrinogen which bind protein A and the clumping factor, respectively, on the bacterial cell surface. These are available from commercial suppliers (e.g., Staphaurex). The most recent latex test (Pastaurex) incorporates monoclonal antibodies to serotype 5 and 8 capsular polysaccharide in order to reduce the number of false negatives. (Some recent clinical isolates of S aureus lack production of coagulase and/or clumping factor, which can make identification difficult.) […] Nowadays, identification of S epidermidis and other species of Staphylococcus is performed using commercial biotype identification kits, such as API Staph Ident, API Staph-Trac, Vitek GPI Card and Microscan Pos Combo. These comprise preformed strips containing test substrates.

• #2 Coagulase-Negative Staphylococcus – Infectious Disease Advisor

  https://www.infectiousdiseaseadvisor.com/ddi/coagulase-negative-staphylococcus/

  Coagulase-negative staphylococci needs to be differentiated from positive staphylococci pathogens, primarily Staphylococcus aureus. Perhaps the greatest challenge in the differential diagnosis is to rule out contamination of blood cultures, particularly in patients with severe immunosuppression or who have prosthetic joints or indwelling medical devices. Proper blood collection procedures and rapid pathogen identification are crucial when evaluating a patient with suspected CoNS infection. […] According to the American Society of Microbiology, the coagulase test can be used to differentiates strains of S. aureus from S. epidermidis and other coagulase-negative species. The 2 types of coagulase tests are the slide test and the tube test; on each test, clumping or clots of any size indicate a positive response. While the slide test is simple and provides results within a few seconds, it is prone to false positives. The tube test is more definitive but can take up to 24 hours to provide results.

• #2 Laboratory tests for bacterial infections

  https://dermnetnz.org/topics/laboratory-tests-for-bacterial-infections

  Various tests are carried out in a laboratory to establish or confirm the diagnosis of a bacterial skin infection. […] The culture of the bacterial species with antibiotic sensitivity testing is considered the gold standard laboratory test. […] Antibiotic sensitivity testing determines which antibiotics inhibit the growth of the bacteria that have been cultured. […] A Gram stain uses a series of stains or dyes on a sample, followed by inspection under a light microscope to detect and identify bacteria as Gram-positive or Gram-negative. […] The coagulase test differentiates coagulase-positive Staphylococcus aureus from coagulase-negative staphylococci. […] The catalase test differentiates catalase-positive staphylococci and micrococci from catalase-negative streptococci. […] PCR involves isolating and amplifying lengths of bacterial DNA from a sample of skin, blood or other tissue. […] ELISA can test for specific organisms either by detecting bacterial antigen during an infection or antibacterial antibody.

• #2 Staph Infection: Causes, Symptoms, Diagnosis & Treatment

  https://my.clevelandclinic.org/health/diseases/21165-staph-infection-staphylococcus-infection

  See your healthcare provider if you have any signs or symptoms of a staph infection. […] Healthcare providers prescribe antibiotics to treat staphylococcal infections. In severe cases, a staph infection can cause serious health complications and death. […] The way your provider determines if you have a staph infection depends on what area of the body is affected. Its easy to see staph infections on your skin. However, providers often rely on Gram stain testing and bacterial culture tests to diagnose the presence of bacteria and the type. […] If you have symptoms of a staph infection, contact your healthcare provider for diagnosis and treatment. […] Most cases of staph infection on the skin can be treated with a topical antibiotic (applied to your skin). […] Healthcare providers also prescribe oral antibiotics (taken by mouth) to treat staph infections inside your body and on your skin.

• #2 Staphylococcal Infections – Infectious Diseases – Merck Manual Professional Edition

  https://www.merckmanuals.com/professional/infectious-diseases/gram-positive-cocci/staphylococcal-infections

  In osteomyelitis, x-ray changes may not be apparent for 10 to 14 days, and bone rarefaction and periosteal reaction may not be detected for even longer. Abnormalities in MRI, CT, or radionuclide bone scans are often apparent earlier. Bone biopsy (open or percutaneous) should be done for pathogen identification and susceptibility testing. […] Some institutions that have a high incidence of methicillin-resistant S. aureus (MRSA) nosocomial infections routinely screen admitted patients for MRSA (active surveillance) by using rapid laboratory techniques to evaluate nasal swab specimens. […] Quick identification of MRSA does the following: Allows carriers to be placed in contact isolation and, when preoperative antibiotic prophylaxis against skin organisms is required, to be given vancomycin as part of their medication regimen. […] In patients with pneumonia, polymerase chain reaction (PCR) testing for MRSA colonization in the nares has been shown to have a negative predictive value of 95% for MRSA lung infection and may therefore be useful in antibiotic management.

• #2 Staphylococcus aureus – Wikipedia

  https://en.wikipedia.org/wiki/Staphylococcus_aureus

  Diagnostic microbiology laboratories and reference laboratories are key for identifying outbreaks and new strains of S. aureus. Recent genetic advances have enabled reliable and rapid techniques for the identification and characterization of clinical isolates of S. aureus in real time. These tools support infection control strategies to limit bacterial spread and ensure the appropriate use of antibiotics. Quantitative PCR is increasingly being used to identify outbreaks of infection. […] When observing the evolvement of S. aureus and its ability to adapt to each modified antibiotic, two basic methods known as „band-based” or „sequence-based” are employed. Keeping these two methods in mind, other methods such as multilocus sequence typing (MLST), pulsed-field gel electrophoresis (PFGE), bacteriophage typing, spa locus typing, and SCCmec typing are often conducted more than others. With these methods, it can be determined where strains of MRSA originated and also where they are currently.

• #2 Current Limitations of Staph Infection Diagnostics, and the Role for VOCs in Achieving Culture-Independent Detection

  https://pmc.ncbi.nlm.nih.gov/articles/PMC9963134/

  VOC biomarkers for S. aureus infections have been studied at all stages of biological and chemical translational development, demonstrating feasibility for diagnosing and characterizing staph infections in clinical and field settings. Based on the published analyses of S. aureus VOCs, ten analytes comprise a common S. aureus volatile suite. All of these metabolites are produced by a broad diversity of fungi and bacteria, including coagulase-negative staphylococci, suggesting they may be produced by universal metabolic pathways. […] While only a subset (25-34%) of in vitro VOCs reliably translate to in vivo detection, animal model studies have shown that breath VOCs can be used to identify infection etiology, even down to the strain level for the bacterial pathogen. VOC signatures detected in human biospecimens can differentiate infected vs. non-infected individuals in conditions where S. aureus is a prevalent etiology, with new diagnostics for VAP being a common target for volatile biomarkers.

• #2 Staph Infection: Diagnosis & Treatment | NewYork-Presbyterian

  https://www.nyp.org/primary-care/staph-infection/treatment

  How is Staph Infection Diagnosed? Diagnosis Your primary care physician will determine if you have a staph infection by starting with a physical exam and asking about your symptoms. Many times, a doctor can see if you have a staph skin infection just by looking at it. […] The physician may order other exams to confirm a staph infection or to see how it affects other organs, such as the heart, lungs, or bones. Tests used to diagnose staph infection may include: A skin scraping, tissue sample, stool sample, or throat or nasal swabbing is to be tested for the presence of staphylococcus bacteria. Imaging tests such as an echocardiogram to diagnose endocarditis, which uses sound waves to see how your heart is pumping. […] A primary care physician can evaluate your symptoms and order any needed tests to make or confirm a diagnosis of staph infection.

• #2 Staphylococcal Infections: Practice Essentials, Background, Pathophysiology

  https://emedicine.medscape.com/article/228816-overview

  Transthoracic echocardiography (TTE): Should be considered in all patients with S aureus or Staphylococcus lugdunensis (S lugdunensis) bacteremia; patients with suspected endocarditis should undergo immediate transesophageal echocardiography (TEE), when possible […] Transesophageal echocardiography (TEE): For all patients with catheter-related S aureus bacteremia (and no contraindications); for all patients with suspected S aureus endocarditis. […] Promptly start antimicrobial therapy when S aureus infection is documented or strongly suspected. Appropriate choices depend on local susceptibility patterns. […] Multiple decolonization regimens have been used in patients with recurrent staphylococcal infection. […] Patients with serious staphylococcal infections should be initially started on agents active against MRSA until susceptibility results are available.

• #2 Staph Infection: Types, Symptoms, Causes, Diagnosis, Treatment and More

  https://www.health.com/staph-infection-7972036

  Computerized tomography (CT) scan: If the provider thinks the infection may have spread to other organs, they can detect bacteria by using this test to produce detailed images of your organs […] Chest X-ray: Chest imaging can check for fluid build-up in the lungs which may occur as a result of a lung staph infection.

• #2 Diagnosis of Brown Recluse Spider Bites Is Overused | AAFP

  https://www.aafp.org/pubs/afp/issues/2007/1001/p943.html

  A retrospective, descriptive analysis of 422 patients presenting to U.S. emergency departments with skin and soft-tissue infections, many following insect bites and stings, has now identified S. aureus, predominantly community-acquired MRSA, as the most frequently identified causative infectious organism (S. aureus in 320 of 422 cases; prevalence = 76 percent; MRSA prevalence = 59 percent). […] To date, most studies of spider bites have been retrospective; bites have not been confirmed by eyewitnesses; and spiders have not been kept alive for later identification, or were identified incorrectly.

• #2 Clinical approach to Staphylococcus aureus bacteremia in adults – UpToDate

  https://www.uptodate.com/contents/clinical-approach-to-staphylococcus-aureus-bacteremia-in-adults

  Patients with S. aureus bacteremia should undergo echocardiography to evaluate for presence of endocarditis. […] Transthoracic echocardiography (TTE) is usually performed first; identification of a vegetation on TTE may obviate the need for transesophageal echocardiography (TEE), although TTE is not sufficient for ruling out infective endocarditis (IE). […] The results of echocardiography are useful even when the study is negative, as the absence of IE may impact decisions about the duration of antimicrobial therapy. […] The indications for TEE in patients with S. aureus bacteremia and no evidence of vegetation on TTE are controversial. TEE is substantially more sensitive than TTE for identification of valvular vegetation; it is most sensitive when performed five to seven days after the onset of bacteremia.

• #2 Methicillin-resistant Staphylococcus aureus (MRSA) Basics | MRSA | CDC

  https://www.cdc.gov/mrsa/about/index.html

  A healthcare provider must send a clinical specimen to a laboratory to determine if MRSA is the cause of an infection. […] Healthcare providers often prescribe antibiotics to treat MRSA infections. Some types of S. aureus infections need surgery to drain infected areas. Your healthcare provider will determine which treatments are best for you. While MRSA can be resistant to several antibiotics, meaning these drugs cannot cure the infections, there are antibiotics available to treat MRSA infections.

• #2 UI researchers find method that could cut staph diagnosis from 2 days to 3 hours | Carver College of Medicine

  https://medicine.uiowa.edu/content/ui-researchers-find-method-could-cut-staph-diagnosis-2-days-3-hours

  Based on its fast turnaround time, this enzyme test may also enable doctors to monitor whether a prescribed antibiotic is doing what its supposed to be doing, and change medications if it isntall in the same day. […] When combined, these procedures provide a foundation for a faster and less expensive diagnosis.

• #2 Current Limitations of Staph Infection Diagnostics, and the Role for VOCs in Achieving Culture-Independent Detection

  https://www.mdpi.com/2076-0817/12/2/181

  The field of VOC-based diagnostics is poised for rapid advancement toward clinical translation. As described herein, there is ample data demonstrating the feasibility of diagnosing staph infections and other bacterial, fungal, viral, and non-infectious disease etiologies using in vitro, animal model, clinical, and field pilot studies.

• #2 Staph Infection: Causes, Symptoms, Diagnosis & Treatment

  https://my.clevelandclinic.org/health/diseases/21165-staph-infection-staphylococcus-infection

  If left untreated, staph infections can be deadly. […] Its important to seek medical help if you think you might have a staph infection. […] Most times, the outlook is favorable for people who have staph infections and are treated properly. […] Since a staph infection can become serious very quickly, you should contact your provider right away if you have signs of a staph infection. […] They arent different. MRSA stands for methicillin-resistant Staphylococcus aureus. MRSA is one type of staph infection, but its one that is harder to treat. […] Minor staph infections may clear up on their own, but its better not to rely on that happening. You should contact your provider because staph infections can get worse quickly and can be serious.

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