Materiały źródłowe

• #1 Streptococcus Group B – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK553143/

  Group B streptococcus (GBS) commonly appears in up to 35% of healthy women’s reproductive or gastrointestinal tracts. Pregnant women colonized with GBS can transmit the bacteria to their newborns at the time of birth. This infection can lead to neonatal sepsis and/or meningitis. Thus, it is essential to screen and understand the clinical presentations and treatments for GBS infections. This activity reviews the healthcare team’s role in the background, presentation, prevention, evaluation, and treatment of Group B streptococcus infections. […] The widespread screening of pregnant women for this organism in the third trimester and subsequent antibiotic prophylaxis for maternal colonization has dramatically reduced the incidence of early-onset neonatal disease from 1.7 cases per 1000 live births in the early 1990s to 0.22 cases per 1000 live births in 2017.

• #1 Prevention of Group B Streptococcal Early-Onset Disease in Newborns | ACOG

  https://www.acog.org/clinical/clinical-guidance/committee-opinion/articles/2020/02/prevention-of-group-b-streptococcal-early-onset-disease-in-newborns

  ABSTRACT: Group B streptococcus (GBS) is the leading cause of newborn infection. The primary risk factor for neonatal GBS early-onset disease (EOD) is maternal colonization of the genitourinary and gastrointestinal tracts. Approximately 50% of women who are colonized with GBS will transmit the bacteria to their newborns. Vertical transmission usually occurs during labor or after rupture of membranes. In the absence of intrapartum antibiotic prophylaxis, 12% of those newborns will develop GBS EOD. Other risk factors include gestational age of less than 37 weeks, very low birth weight, prolonged rupture of membranes, intraamniotic infection, young maternal age, and maternal black race. The key obstetric measures necessary for effective prevention of GBS EOD continue to include universal prenatal screening by vaginalrectal culture, correct specimen collection and processing, appropriate implementation of intrapartum antibiotic prophylaxis, and coordination with pediatric care providers. The American College of Obstetricians and Gynecologists now recommends performing universal GBS screening between 36 0/7 and 37 6/7 weeks of gestation. All women whose vaginalrectal cultures at 36 0/737 6/7 weeks of gestation are positive for GBS should receive appropriate intrapartum antibiotic prophylaxis unless a prelabor cesarean birth is performed in the setting of intact membranes.

• #1 Group B Streptococcal Disease | Choose the Right Test

  https://arupconsult.com/content/streptococcal-disease-group-b

  Detailed recommendations for the laboratory detection and identification of GBS in pregnant individuals, including specimen collection and storage information, can be found in the ASMs Guidelines for the Detection and Identification of Group B Streptococcus. […] ASM recommends screening pregnant individuals for colonization with GBS at 36 0/7 to 37 6/7 weeks of gestation with a single swab of the lower vagina and then rectum. […] Culture is the most common laboratory method for the identification of GBS. […] NAAT has a faster turnaround time and may be useful in some situations. […] It is important that NAAT be performed on specimens incubated in enrichment broth to maximize sensitivity and specificity. […] In other individuals with group B streptococcal disease, diagnosis is confirmed when GBS is isolated from a normally sterile body site such as blood or cerebrospinal fluid (CSF). […] Antimicrobial susceptibility testing should be performed on all GBS isolates from pregnant individuals with a severe penicillin allergy to inform selection of an alternate antibiotic treatment.

• #1 Streptococcus Group B Culture | Test Detail | Quest Diagnostics

  https://testdirectory.questdiagnostics.com/test/test-detail/5617/streptococcus-group-b-culture?p=r&cc=MASTER

  Streptococcus Group B Culture – Group B streptococci can be one of the most significant pathogens in the neonatal period. The organism is transmitted to the newborn through the birth canal. Prepartum vaginal introitus and anorectal cultures are important to determine carriage. […] If culture is positive, identification will be performed at an additional charge (CPT code(s): 87077 or 87140 or 87143 or 87147 or 87149). Antibiotic susceptibilities are only performed when appropriate (CPT code(s): 87181 or 87184 or 87185 or 87186). […] Bacterial Culture, Aerobic Routine Isolation and Identification Procedure includes Broth Enhanced Culture. […] For prenatal cultures obtain specimens from both the vaginal introitus and anorectum utilizing one or two swabs. Cervical cultures are not acceptable for prenatal screening; a speculum should not be used. After culture collection place swab(s) into one bacterial transport medium. […] Non vaginal/rectal specimens • Viral transport medium • Molecular transport system.

• #1 Group B Strep and Pregnancy (for Parents) | Nemours KidsHealth

  https://kidshealth.org/en/parents/groupb.html

  Pregnant women are routinely tested for GBS late in the pregnancy, usually between weeks 35 and 37. The test is simple, inexpensive, and painless. Called a culture, it involves using a large cotton swab to collect samples from the vagina and rectum. These samples are tested in a lab to check for GBS. The results are usually available in 1 to 3 days. […] If a test finds GBS, the woman is said to be „GBS-positive.” This means only that she has the bacteria in her body not that she or her baby will become sick from it. […] GBS infection in babies is diagnosed by testing a sample of blood or spinal fluid. But not all babies born to GBS-positive mothers need testing. Most healthy babies are simply watched to see if they have signs of infection.

• #1 GBS Testing – Group B Strep International

  https://www.groupbstrepinternational.org/gbs-testing.html

  If the test result is positive, you should receive IV antibiotics when labor starts or your water breaks. […] A pregnant individual may test negative if her GBS colonization level at the time of the test was below the level of detection. […] A pregnant individual’s GBS status can change so they could test negative but be colonized later in pregnancy and vice versa. […] Test results are considered to accurately (95%-98%) predict a pregnant individual’s colonization status at delivery if she delivers within 5 weeks of her test. They may need to be retested if she has not yet given birth within 5 weeks of being tested. […] After birth, a baby can become infected from sources other than the pregnant parent and 60% of early-onset cases occur to infants whose parent tested negative. […] Some hospitals will offer rapid DNA-based tests which can be performed during labor or any time during pregnancy with results in just a few hours. These tests can help supplement your routine group B strep (GBS) testing because: Your GBS status can change by the time you go into labor. […] Culture tests can show a false negative. […] Your culture test results may not be available.

• #1 Strep B Test: MedlinePlus Medical TestLock

  https://medlineplus.gov/lab-tests/strep-b-test/

  Strep B, also known as group B strep (GBS), is a type of bacteria commonly found in the digestive tract, urinary tract, and genital area. […] A group B strep test checks for GBS bacteria. If you are pregnant and the test shows that you have GBS, taking antibiotics during labor can protect your baby from infection. […] If you are pregnant, a group B strep test is most often used to look for GBS bacteria during your routine prenatal screening. It may also be used to test infants who show signs of infection. […] You may need a strep B test if you are pregnant. The American College of Obstetricians and Gynecologists recommends GBS testing if you are pregnant. Testing is usually done between 36 and 38 weeks of pregnancy. If you go into labor earlier than 36 weeks, you may be tested at that time.

• #1 Laboratory Testing for Group B Streptococcus | Group B Strep | CDC

  https://www.cdc.gov/group-b-strep/php/laboratories/index.html

  Laboratory methods for group B Streptococcus (Streptococcus agalactiae, GBS) screening and testing haven’t changed substantially over the past decade. […] Culture remains the gold standard method. […] In 2021, the American Society for Microbiology (ASM) released new guidelines for detecting and identifying GBS to prevent disease in newborns. ASM’s guidelines replace the 2010 guidelines published by CDC. […] The CDC Streptococcus Laboratory supports the national population-based Active Bacterial Core surveillance through serotyping of GBS isolates, antimicrobial susceptibility testing, and strain characterization by whole-genome sequencing. […] The lab supports training and development of improved strain surveillance methods.

• #1 Group B Streptococcus | Diagnostic Laboratory Services, Inc.

  https://dlslab.com/physicians/group-b-streptococcus/

  The first strategy consists of the collection of vaginal and rectal combination cultures at 35-37 weeks gestation to identify women with GBS colonization. […] To minimize false negative prenatal culture results, cultures should be taken at 35-37 weeks gestation. […] Optimal identification of GBS carriers is dependent not only on the timing of the culture but on the appropriate sites of collection. […] The laboratory performing the culture should use a broth selective for GBS. […] The rapid direct antigen detection methods (similar to the ones used for group A strep. in throats), are discouraged because of poor sensitivity. […] Colonies suspicious for GBS are identified by group specific antigen testing.

• #1 Alethia Group B Strepococcus | Meridian Bioscience

  https://www.meridianbioscience.com/diagnostics/disease-areas/pediatric-neonatal/group-b-strep/alethia-group-b-streptococcus/

  Molecular assay for the detection of Group B Streptococcus. Alethia provides a quick, accurate and reliable molecular assay for Group B Strep detection. […] Studies have shown that testing within four weeks of delivery is most accurate at predicting GBS colonization status at delivery. The 2020 guidelines published by the American College of Obstetricians and Gynecologists (ACOG) state that screening should be done between 36-38 weeks of gestation. […] Broth enrichment greatly enhances the recovery of GBS thus improving the sensitivity. The 2010 CDC guidelines state that all samples must be enriched in broth media for 18-24 hours. For GBS disease, an accurate screening result is far more important than a rapid screening result. […] The majority of infants that develop GBS disease are born to mothers who tested negative for Group B Streptococcus. This is due in large part to false-negative culture results. The sensitivity of culture is unreliable and is documented to be as low as 42%. The lack of sensitivity can be attributed to several factors including: Subjectivity, 4% of GBS isolates are nonhemolytic and therefore are undetectable on the culture plate, Overgrowth of normal flora can inhibit the ability to identify GBS colonies.

• #1 Group B Streptococcus by PCR Testing | Clinical Pathology Laboratories

  https://www.cpllabs.com/gbs-by-pcr/

  Clinical Pathology Laboratories has validated a new qualitative method for detection of Group B Streptococcus (GBS), Streptococcus agalactiae, by Real-Time Polymerase Chain Reaction (PCR) to improve sensitivity and timeliness over culture-based test methods. […] While culture-based methods are considered the historical standard, ASM and CDC include provisions for using PCR/NAAT for GBS screening. After broth enrichment, PCR has sensitivity given as 96%. Recent studies report variable sensitivities for culture, but this may be as low as 53 to 70%. Additionally, PCR-based testing has shorter turnaround time (TAT), 36-48 hours including enrichment. […] Effective October 9, 2023, two orderable test codes for GBS detection by PCR are offered by CPL. GBS by PCR reflex to antimicrobial sensitivity testing should be limited to use in penicillin-allergic patients only. These tests are considered replacements for GBS screening by culture. […] GBS by PCR TAT is 36-48 hours vs. 2-3 days for culture-based screening. […] The CPL assay includes an internal control to prevent false-negative results. […] This is a custom designed TaqMan real-time PCR assay on the Thermofisher Quantstudio platform validated by CPL.

• #1 Xpert® Xpress GBS

  https://www.cepheid.com/en-US/tests/blood-virology-womens-health-sexual-health/xpert-xpress-gbs.html

  In the U.S., Group B Streptococcus (GBS) remains a leading cause of early-onset neonatal sepsis. Rates of maternal colonization have not changed, but universal antenatal screening at 3637 weeks along with the use of intrapartum antibiotic prophylaxis (IAP) has resulted in a decrease of early onset disease. […] The Xpert Xpress GBS test is intended to aid in the diagnosis of GBS colonization intrapartum to identify candidates for antibiotic prophylaxis. With results in less than an hour, the Xpert Xpress GBS test delivers 93.5% sensitivity and 95.5% specificity. […] Identify GBS colonization status at the time of labor (intrapartum) of low-risk women at term with unknown GBS status. […] The Xpert Xpress GBS test, performed on the GeneXpert Instrument Systems, is an automated, real-time PCR test for the qualitative detection of Group B Streptococcus (GBS) DNA from vaginal/rectal swab specimens collected from pregnant patients for intrapartum testing at term (e.g., 37 weeks) who have unknown or unavailable antepartum GBS screening test results and no additional risk factors that would warrant empiric antibiotic prophylaxis. The Xpert Xpress GBS test performed during intrapartum is intended to aid in the detection of GBS colonization in patients presenting in labor who may be candidates for antibiotic prophylaxis.

• #1 Carrot Broth™ OneStep for Group B Strep

  https://hardydiagnostics.com/z40

  Strep B Carrot Broth™ One-Step is a selective and differential medium that is intended for the detection of Group B Streptococcus (GBS) also known as Streptococcus agalactiae, from anovaginal specimens collected from pregnant women. The medium is used as an aid in the qualitative determination of GBS colonization in pregnant women. The color change reaction from white to orange is representative of a positive result for the presence of hemolytic GBS. […] Our one-step test is an improvement over conventional methods by increasing sensitivity, decreasing turn-around time, and lowering overall cost. All components are now included in the color change test, so the use of additional tiles is no longer necessary. Positives require no follow-up testing! […] Accurate results for positives, there is no need for further sub-culturing or testing.

• #1 Reliable Detection of Group B Streptococcus in the Clinical Laboratory

  https://pmc.ncbi.nlm.nih.gov/articles/PMC5648696/

  Group B streptococcus (GBS) is a leading cause of invasive neonatal infections and a significant pathogen in immunocompromised adults. Screening to detect GBS colonization in pregnant women determines the need for antibiotic prophylaxis in that pregnancy. Efficient determination of the GBS colonization status of pregnant women is crucial. […] The availability of technologies such as matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS), molecular techniques, and chromogenic culture media, including Granada-type media, have changed the scenario for GBS detection and identification. […] A key prerequisite for efficient application of IAP is the reliable detection of GBS vaginorectal colonization before delivery. […] Because GBS colonization status can fluctuate during pregnancy, the timing of specimen collection is important. […] The use of Granada-type and chromogenic media is a good alternative for the identification of GBS carrier status among near-term pregnant women. […] Moreover, culture methods for GBS detection remain a compulsory step for women reporting an allergy to penicillin.

• #1 Group B streptococcal infection – Wikipedia

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

  Group B streptococcal infection, also known as Group B streptococcal disease or just Group B strep infection, is the infectious disease caused by the bacterium Streptococcus agalactiae. […] GBS is characterized by the presence in the cell wall of the group B antigen of the Lancefield classification (Lancefield grouping) that can be detected directly in intact bacteria using latex agglutination tests. […] The CAMP test is also another important test for the identification of GBS. […] Identification of GBS could also be carried out easily using matrix-assisted laser desorption ionization-time of flight (MALDI-TOF) mass spectrometry. […] GBS is found in the gastrointestinal, genitourinary tract, and oropharynx of humans. […] GBS urinary tract infections, more than 100.000 CFU (colony forming units) /mL, may induce labour in pregnant women and cause premature delivery (preterm birth) and miscarriage and requires antibiotic treatment.

• #1 Group B strep disease – Diagnosis & treatment – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/group-b-strep/diagnosis-treatment/drc-20351735

  If your newborn might have group B strep disease, a sample of your baby’s blood or spinal fluid likely will be taken. A lab checks the sample for the bacteria that causes the infection. […] For adults who have an infection, a blood test can find out if group B strep is the cause. Learning the cause may be important for figuring out the right treatment.

• #1 Group B streptococcal infection – Symptoms, diagnosis and treatment | BMJ Best Practice US

  https://bestpractice.bmj.com/topics/en-us/924

  Group B streptococcal infection is the most common cause of early, severe infection in newborns. […] Diagnosis is confirmed by isolation of group B streptococci (GBS) from usually sterile body fluid. […] Key diagnostic factors include fever, symptoms of meningitis, signs of meningitis, symptoms of sepsis, signs of sepsis, symptoms of pneumonia, signs of pneumonia, symptoms of urinary tract infection, signs of urinary tract infection, symptoms of cellulitis, signs of cellulitis, symptoms of septic arthritis, signs of septic arthritis, symptoms of conjunctivitis, symptoms of sinusitis, signs of sinusitis, symptoms of otitis media, signs of otitis media, symptoms of endometritis, signs of endometritis, signs of chorioamnionitis. […] Other diagnostic factors include nonspecific signs of infection in neonate, nonspecific signs of infection in older patients, symptoms of intra-abdominal infection, signs of intra-abdominal infection, midgestation abortion or preterm labor.

• #1 Group B streptococcal infection – Symptoms, diagnosis and treatment | BMJ Best Practice US

  https://bestpractice.bmj.com/topics/en-us/924

  1st tests to order include CBC, BUN, serum electrolytes, serum glucose, coagulation studies, LFTs, C-reactive protein (CRP), blood culture, cerebrospinal fluid (CSF) Gram stain, CSF culture, CSF cell count and differential, CSF glucose and protein, antigen detection in CSF, Gram stain and culture of other sterile body fluids, chest x-ray, plain joint and/or bone x-ray, CT head.

• #1 GBS | Diagnosis, and Treatment | Group B Strep | CDC

  http://medbox.iiab.me/modules/en-cdc/www.cdc.gov/groupbstrep/about/diagnosis.html

  Group B strep disease is diagnosed by taking samples of a babys sterile body fluids, such as blood or spinal fluid. These samples are cultured (bacteria grown in the laboratory) to see if group B strep bacteria are present, which can take a few days. […] For both early-onset (occurs in babies younger than 1 week old) and late-onset (occurs in babies 1 week through 3 months old) disease, if a group B strep infection is suspected, doctors will take a sample of the babys blood and spinal fluids or take a chest x-ray to confirm the diagnosis.

• #1 Group B Streptococcus (GBS) Infections: Practice Essentials, Background, Pathophysiology

  https://emedicine.medscape.com/article/229091-overview

  GBS infection is primarily managed with antibiotics, including the following: Penicillin G: Drug of choice for GBS infection […] Ampicillin: Another drug of choice for GBS infection […] Vancomycin: Initial treatment of choice for GBS infection in patients who are allergic to penicillin (owing to possible resistance to clindamycin) […] Group B streptococci remain sensitive to penicillin and ampicillin and were once also sensitive to cefazolin, erythromycin, and clindamycin.

• #1 Prevention of Group B Streptococcal Early-Onset Disease in Newborns | ACOG

  https://www.acog.org/clinical/clinical-guidance/committee-opinion/articles/2020/02/prevention-of-group-b-streptococcal-early-onset-disease-in-newborns

  If the prenatal GBS culture result is unknown when labor starts, intrapartum antibiotic prophylaxis is indicated for women who have risk factors for GBS EOD. […] If a woman presents in labor at term with unknown GBS colonization status and does not have risk factors that are an indication for intrapartum antibiotic prophylaxis but reports a known history of GBS colonization in a previous pregnancy, the risk of GBS EOD in the neonate is likely to be increased. […] Intravenous penicillin remains the agent of choice for intrapartum prophylaxis, with intravenous ampicillin as an acceptable alternative. […] For women who are at high risk of anaphylaxis after exposure to penicillin, the laboratory requisitions for ordering antepartum GBS screening cultures (whether on paper or online in electronic medical records) should indicate clearly the presence of penicillin allergy.

• #1 Strep B Test: MedlinePlus Medical TestLock

  https://medlineplus.gov/lab-tests/strep-b-test/

  If you are pregnant and results show you have GBS bacteria, you will be given antibiotics intravenously (by IV) during labor, at least four hours before delivery. This will prevent you from passing the bacteria to your baby. […] If your baby’s results show a GBS infection, he or she will be treated with antibiotics. If your provider suspects a GBS infection, he or she may treat your baby before test results are available. This is because GBS can cause serious illness or death.

• #1 Streptococcus – Infectious Disease Advisor

  https://www.infectiousdiseaseadvisor.com/ddi/streptococcus/

  The American Academy of Pediatrics (AAP), together with the American College of Obstetrics and Gynecologists (ACOG) released guidelines for the clinical management of infants at risk for diseases caused by group B streptococcal disease in 2019, which provide the following recommendations to clinicians. To minimize the risk for transmission of these diseases from pregnant individuals to their infants during birth, AAP and ACOG recommend antenatal testing with a vaginal-rectal culture at 36 to 37 weeks gestation for all pregnant individuals and the use of prophylactic antibiotic treatment for the following groups: Pregnant individuals testing positive for group B streptococcal disease; Patients with group B streptococcal disease bacteriuria during pregnancy; Pregnant individuals with history of infant(s) with group B streptococcal disease; Patients in preterm labor before 37 weeks gestation; and Pregnant individuals with preterm prelabor rupture of membranes. The following antibiotics are recommended for intrapartum prophylactic antibiotic treatment: Penicillin G; Ampicillin; Cefazolin (for people with a penicillin allergy who are at low risk for anaphylaxis); Clindamycin (for people with a penicillin allergy who are at high risk for anaphylaxis); and Vancomycin (for people with a penicillin allergy who are at high risk for anaphylaxis if colonized with clindamycin-resistant group B streptococcal disease). Intrapartum antibiotic therapy has been shown to prevent vertical transmission of GBS and reduce the risk for invasive group B streptococcal disease in infants. AAP and ACOG recommend intrapartum antibiotic therapy if intra-amniotic infection is present or suspected.

• #1 Group B Strep (GBS) in pregnancy | Pregnancy Birth and Baby

  https://www.pregnancybirthbaby.org.au/group-b-strep-test

  Testing for GBS involves taking a swab of the inside the vagina and rectum. […] The swab is usually taken between 35 to 37 weeks of pregnancy to make sure it is the most accurate and to avoid overtreatment of antibiotics during labour. […] If your GBS test is positive, or if you have risk factors as listed above, your doctor or midwife will probably recommend that you have intravenous (IV) antibiotics when your waters break or when labour starts. […] The antibiotic usually given is penicillin, but other options are available if you are allergic to penicillin. […] Early detection and treatment with antibiotics during labour may reduce the chance of your baby becoming very unwell in the first few days of their life.

• #1 Group B Strep and Pregnancy | ACOG

  https://www.acog.org/womens-health/faqs/group-b-strep-and-pregnancy

  Are there times when antibiotics are given without testing first? In some cases, your doctor may recommend antibiotics during labor without testing for GBS. Antibiotics may be given without testing if you had a previous child who had GBS disease, you have GBS bacteria in your urine at any point during your pregnancy, your GBS status is not known when you go into labor and you have a fever, your GBS status is not known and you go into labor before 37 weeks, your GBS status is not known and it has been 18 hours or more since your water broke, your GBS status for this pregnancy is not known but you tested positive for GBS in a past pregnancy. […] What if I plan to have a cesarean birth? If you have a cesarean birth, you do not need to be given antibiotics for GBS during delivery if your labor has not started and the amniotic sac has not ruptured (your water has not broken). But you should still be tested for GBS because labor may happen before a cesarean birth. If the test result is positive, the baby may need to be monitored for GBS disease after birth.

• #1 Streptococcus Group B – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK553143/

  Definitive testing: Culture of the organism from a sterile body site establishes the diagnosis of GBS infection. […] The initial therapy for suspected neonatal sepsis is ampicillin and an aminoglycoside, typically gentamicin. Both ampicillin and gentamicin have activity against GBS, which is the most common cause of neonatal sepsis. […] Intrapartum antibiotic prophylaxis (IAP) is indicated for all mothers with a positive GBS screening culture routinely obtained at 35 to 37 weeks gestation. Revised guidelines from 2010 also recommend IAP for pregnant women who have a history of GBS bacteriuria at any point during the current pregnancy or have a history of a previous infant with invasive GBS disease. […] To prevent transmission of GBS from mother to infant, all pregnant women should be screened for GBS colonization as part of their routine prenatal care late in their third trimester (usually between 35 and 37 weeks of gestation).

• #1 Group B Strep in Pregnancy

  https://patient.info/pregnancy/strep-b-in-pregnancy

  If you are found to carry GBS in your vagina or rectum, treating you with antibiotics before your labour begins does not reduce the chance of your baby developing GBS infection. You do not need antibiotic treatment until labour starts. […] When your labour begins, you will be offered antibiotics through a drip to reduce the chance of your baby being infected. These antibiotics reduce the risk of your baby developing a GBS infection in their first week of life from around 1 in 400 to 1 in 4,000. […] If it is thought that your newborn baby may have an infection, tests will be done to see whether GBS is the cause. This may involve taking a sample of your baby’s blood, or a sample of fluid from around your baby’s spinal cord (a lumbar puncture). […] Babies with signs of GBS infection or babies who are suspected to have the infection should be treated with antibiotics as soon as possible. Treatment will be stopped if there is no sign of infection after at least 36 hours, and all the tests are negative.

• #1 Group B Strep Treatment, Symptoms, Infection During Pregnancy

  https://www.emedicinehealth.com/group_b_strep_infection/article_em.htm

  Antibiotics can treat group B strep infections. […] To do this, the doctor swabs the inside of the vagina and/or rectum and sends the swab to the laboratory for culture. […] It is important to identify pregnant women who are colonized with group B strep so they can be treated before the baby enters the birth canal. […] Diagnosis and management of group B strep infections cannot be done at home. […] The usual choice for antibiotics is intravenous penicillin. […] Antibiotics cure infections due to group B strep. […] Although culture is the recommended test of choice for pregnant women, results take up to three days to come back. Several more rapid tests have been developed and are being tested to determine if they could replace culture.

• #1 Group B Strep Awareness: Testing, Risks, and Treatment – BuzzRx Select permission for Location

  https://www.buzzrx.com/blog/group-b-strep-awareness

  Group B Streptococcus (GBS) bacteria are commonly found in the gastrointestinal tract (including the stomach and intestines) and the genital tract (including the vagina in women). In most cases, these bacteria do not cause any symptoms or illness in healthy individuals. […] Routine screening for group B strep is recommended for all pregnant women between 36 and 37 weeks of gestation. If you test positive for group B strep, antibiotics can be used to treat the infection. […] A pregnant woman is tested for GBS at 37 weeks. If the mother-to-be tests GBS positive, she is given antibiotics intravenously during labor. This treatment alone brings the likelihood of passing on GBS to the newborn from 1 in 200 to 1 in 4,000. […] A healthcare provider can take a swab from the vagina and rectum and send the sample to the lab for testing for GBS. Pregnant adults are routinely tested for GBS at the end of the pregnancy (around 37 weeks). […] If the test is positive for the GBS bacterium: Pregnant women receive IV antibiotics during labor to lower the risk of passing Group B Strep to the baby during vaginal delivery.

• #1 Group B Strep and Pregnancy | ACOG

  https://www.acog.org/womens-health/faqs/group-b-strep-and-pregnancy

  Will I be tested for group B strep? Yes, you should be screened for GBS as part of routine prenatal care. The test for GBS is called a culture. It is now done between 36 and 38 weeks of pregnancy. In this test, a swab is used to take a sample from the vagina and rectum. […] What if the test result is positive? If the results show that GBS is present, antibiotics are usually given through an intravenous (IV) line once labor has started. This is done to help protect the fetus from being infected. The best time for treatment is during labor. […] Penicillin is the antibiotic that is most often given to prevent early-onset disease in newborns. While treatment with antibiotics during labor can help prevent early-onset GBS disease in a baby, this treatment does not prevent late-onset disease.

• #1

  https://www.meningitis.org/meningitis/bacterial-meningitis/groupb-streptococcal-meningitis

  Group B streptococcal (GBS) meningitis is a very serious illness that can cause death and long-term disability. […] Currently there are no vaccines available that prevent group B streptococcal meningitis, but they are under development. […] Group B streptococcal meningitis must always be treated urgently with antibiotics. […] Prompt recognition and hospital treatment offer the best chance of a good recovery. […] Most babies who get group B streptococcal meningitis will make a good recovery if treated quickly. […] Up to half of babies who develop group B streptococcal meningitis will be left with some level of long-term disability caused by damage to the brain during the illness. […] Most early-onset group B strep infections in babies are preventable by identifying pregnant women who are at increased risk of having a baby with a group B strep infection and treating the mother with antibiotics during labour. […] Currently, there is no vaccine to protect against group B streptococcal meningitis. Scientists are working to develop a vaccine that can be given to pregnant women to protect their babies during pregnancy and birth.

• #1 GBS Testing – Group B Strep International

  https://www.groupbstrepinternational.org/gbs-testing.html

  Approximately 1 in 5 pregnant individuals globally carry group B strep (GBS), a leading cause of invasive infection in babies worldwide. GBS can infect babies during pregnancy, at birth, and during the first few months of life. Not all babies exposed to GBS become infected, but, for those who do, the results can be devastating. GBS can cause babies to be miscarried, stillborn, born prematurely, become very sick, have lifelong handicaps, or die. Even babies born to those who test negative can become infected by group B strep. […] Fortunately there are ways to help protect babies from group B strep disease, such as testing for group B strep during pregnancy! Knowing your GBS status can help you and your healthcare team take steps to help protect your baby. […] It is now the standard of care in many countries for all pregnant individuals to be routinely tested for group B strep (GBS) during their 36th or 37th week of each pregnancy (since levels of GBS can change, each pregnancy can be different) unless their urine already cultured positive in the current pregnancy or they have had a previous baby with GBS disease (in these cases, they should be treated as being GBS positive regardless). Your provider will perform a swab test of both your vagina and rectum and receive the test results in 23 days.

• #2 Group B Streptococcal Disease | Choose the Right Test

  https://arupconsult.com/content/streptococcal-disease-group-b

  Group B Streptococcus (GBS), also known as Streptococcus agalactiae, is the leading cause of newborn infection; presentations of GBS include bacteremia, meningitis, neonatal sepsis, pneumonia, or other focal infections. […] Laboratory testing for GBS is recommended for antepartum screening of pregnant individuals to inform potential intrapartum antibiotic prophylaxis and prevent early-onset disease in neonates. […] Universal screening for group B Streptococcus (GBS) is recommended for all pregnant individuals at 36 0/7 to 37 6/7 weeks of gestation unless intrapartum antibiotic prophylaxis for GBS is indicated due to existing risk factors. […] Diagnostic laboratory testing may be useful for patients who exhibit signs and symptoms of GBS infection including bacteremia without a focus, meningitis, bone and joint infections, or other soft tissue infections.

• #2 Prevention of Group B Streptococcal Early-Onset Disease in Newborns | ACOG

  https://www.acog.org/clinical/clinical-guidance/committee-opinion/articles/2020/02/prevention-of-group-b-streptococcal-early-onset-disease-in-newborns

  ABSTRACT: Group B streptococcus (GBS) is the leading cause of newborn infection. The primary risk factor for neonatal GBS early-onset disease (EOD) is maternal colonization of the genitourinary and gastrointestinal tracts. Approximately 50% of women who are colonized with GBS will transmit the bacteria to their newborns. Vertical transmission usually occurs during labor or after rupture of membranes. In the absence of intrapartum antibiotic prophylaxis, 12% of those newborns will develop GBS EOD. Other risk factors include gestational age of less than 37 weeks, very low birth weight, prolonged rupture of membranes, intraamniotic infection, young maternal age, and maternal black race. The key obstetric measures necessary for effective prevention of GBS EOD continue to include universal prenatal screening by vaginalrectal culture, correct specimen collection and processing, appropriate implementation of intrapartum antibiotic prophylaxis, and coordination with pediatric care providers. The American College of Obstetricians and Gynecologists now recommends performing universal GBS screening between 36 0/7 and 37 6/7 weeks of gestation. All women whose vaginalrectal cultures at 36 0/737 6/7 weeks of gestation are positive for GBS should receive appropriate intrapartum antibiotic prophylaxis unless a prelabor cesarean birth is performed in the setting of intact membranes.

• #2 Prevention of Group B Streptococcal Early-Onset Disease in Newborns | ACOG

  https://www.acog.org/clinical/clinical-guidance/committee-opinion/articles/2020/02/prevention-of-group-b-streptococcal-early-onset-disease-in-newborns

  Targeted intravenous intrapartum antibiotic prophylaxis has demonstrated efficacy for prevention of GBS early-onset disease (EOD) in neonates born to women with positive antepartum GBS cultures and women who have other risk factors for intrapartum GBS colonization. Neither antepartum nor intrapartum oral or intramuscular regimens have been shown to be comparably effective in reducing GBS EOD. […] Regardless of planned mode of birth, all pregnant women should undergo antepartum screening for GBS at 36 0/737 6/7 weeks of gestation, unless intrapartum antibiotic prophylaxis for GBS is indicated because of GBS bacteriuria during the pregnancy or because of a history of a previous GBS-infected newborn. […] All women whose vaginalrectal cultures at 36 0/737 6/7 weeks of gestation are positive for GBS should receive appropriate intrapartum antibiotic prophylaxis unless a prelabor cesarean birth is performed in the setting of intact membranes.

• #2 Group B Streptococcus (GBS) Infections Workup: Laboratory Studies, Imaging Studies, Other Tests

  https://emedicine.medscape.com/article/229091-workup

  For pregnant individuals, both vaginal and rectal swabs should be obtained at 36 0/7 and 37 6/7 weeks of gestation. A single swab is used for culture; first a specimen is obtained from the lower vagina, then a specimen is obtained from the rectum. This method increases the culture yield significantly when compared with either sampling from the cervix or rectum alone or a single vaginal swab without a rectal swab. […] Samples can be collected by the patients themselves, and studies have shown that self-collected samples are as accurate as those collected by physicians. […] Isolation of group B streptococci from blood, cerebrospinal fluid, and/or a site of local suppuration is the only method for diagnosing invasive GBS infection. […] GBS antigen may be detected in blood, cerebrospinal fluid, and/or urine but is noted to have sensitivity around 57%.

• #2 Streptococcus Group B with Susceptibility Culture | Test Detail | Quest Diagnostics

  https://testdirectory.questdiagnostics.com/test/test-detail/15090/streptococcus-group-b-with-susceptibility-culture?p=r&cc=MASTER

  Streptococcus Group B with Susceptibility Culture – Group B streptococci can be one of the most significant pathogens in the neonatal period. The organism is transmitted to the newborn through the birth canal. Prepartum vaginal introitus and anorectal cultures are important to determine carriage. […] If culture is positive, identification will be performed at an additional charge, (CPT code(s): 87077 or 87140 or 87143 or 87147 or 87149). Antibiotic susceptibilities will be performed on Group B streptococcus isolates (CPT code(s): 87181 or 87184 or 87186). […] Bacterial Culture, Aerobic Isolation and Identification Procedure including Broth Enhanced Culture and Susceptibility. […] For prenatal cultures obtain specimens from both the vaginal introitus and anorectum utilizing one or two swabs. Cervical cultures are not acceptable for prenatal screening; a speculum should not be used. After culture collection place swab(s) into one bacterial transport medium. […] Room temperature: 48 hours Refrigerated: 48 hours Frozen: Unacceptable. […] Non vaginal/rectal specimens • Viral transport medium • Molecular transport system.

• #2 Group B strep disease – Symptoms & causes – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/group-b-strep/symptoms-causes/syc-20351729

  If you’re pregnant, get a group B strep screening test during your third trimester. If you have this type of bacteria in your body, medicines called antibiotics given to you during labor can protect your baby. […] If you have symptoms of group B strep infection, call a member of your health care team right away. This is especially important if you have any of the following risk factors: […] If you’re pregnant, the American College of Obstetricians and Gynecologists recommends a group B strep screening test during weeks 36 to 37 of pregnancy. Talk to your health care professional about when to get screened if you live outside of the U.S. […] A „positive” test result means that you carry group B strep. It doesn’t mean that you’re ill or that your unborn baby will be affected. But you do have a higher risk of passing the bacteria to your baby.

• #2 Alethia Group B Strepococcus | Meridian Bioscience

  https://www.meridianbioscience.com/diagnostics/disease-areas/pediatric-neonatal/group-b-strep/alethia-group-b-streptococcus/

  Molecular assay for the detection of Group B Streptococcus. Alethia provides a quick, accurate and reliable molecular assay for Group B Strep detection. […] Studies have shown that testing within four weeks of delivery is most accurate at predicting GBS colonization status at delivery. The 2020 guidelines published by the American College of Obstetricians and Gynecologists (ACOG) state that screening should be done between 36-38 weeks of gestation. […] Broth enrichment greatly enhances the recovery of GBS thus improving the sensitivity. The 2010 CDC guidelines state that all samples must be enriched in broth media for 18-24 hours. For GBS disease, an accurate screening result is far more important than a rapid screening result. […] The majority of infants that develop GBS disease are born to mothers who tested negative for Group B Streptococcus. This is due in large part to false-negative culture results. The sensitivity of culture is unreliable and is documented to be as low as 42%. The lack of sensitivity can be attributed to several factors including: Subjectivity, 4% of GBS isolates are nonhemolytic and therefore are undetectable on the culture plate, Overgrowth of normal flora can inhibit the ability to identify GBS colonies.

• #2 GBS Testing – Group B Strep International

  https://www.groupbstrepinternational.org/gbs-testing.html

  If the test result is positive, you should receive IV antibiotics when labor starts or your water breaks. […] A pregnant individual may test negative if her GBS colonization level at the time of the test was below the level of detection. […] A pregnant individual’s GBS status can change so they could test negative but be colonized later in pregnancy and vice versa. […] Test results are considered to accurately (95%-98%) predict a pregnant individual’s colonization status at delivery if she delivers within 5 weeks of her test. They may need to be retested if she has not yet given birth within 5 weeks of being tested. […] After birth, a baby can become infected from sources other than the pregnant parent and 60% of early-onset cases occur to infants whose parent tested negative. […] Some hospitals will offer rapid DNA-based tests which can be performed during labor or any time during pregnancy with results in just a few hours. These tests can help supplement your routine group B strep (GBS) testing because: Your GBS status can change by the time you go into labor. […] Culture tests can show a false negative. […] Your culture test results may not be available.

• #2 Group B Streptococcal Disease | Choose the Right Test

  https://arupconsult.com/content/streptococcal-disease-group-b

  Detailed recommendations for the laboratory detection and identification of GBS in pregnant individuals, including specimen collection and storage information, can be found in the ASMs Guidelines for the Detection and Identification of Group B Streptococcus. […] ASM recommends screening pregnant individuals for colonization with GBS at 36 0/7 to 37 6/7 weeks of gestation with a single swab of the lower vagina and then rectum. […] Culture is the most common laboratory method for the identification of GBS. […] NAAT has a faster turnaround time and may be useful in some situations. […] It is important that NAAT be performed on specimens incubated in enrichment broth to maximize sensitivity and specificity. […] In other individuals with group B streptococcal disease, diagnosis is confirmed when GBS is isolated from a normally sterile body site such as blood or cerebrospinal fluid (CSF). […] Antimicrobial susceptibility testing should be performed on all GBS isolates from pregnant individuals with a severe penicillin allergy to inform selection of an alternate antibiotic treatment.

• #2 Hardy Diagnostics Strep B Carrot Broth Saving Lives

  https://www.rapidmicrobiology.com/news/hardy-diagnostics-strep-b-carrot-broth-saving-the-lives-of-newborns

  Group B Strep causes over 20,000 cases of infant meningitis, sepsis and pneumonia each year. About 10% of these cases will result in death. […] The detection of the organism is important in order to begin treatment of the mother with antibiotics prior to childbirth. […] The CDC requires that all pregnant women be tested for the presence of Group B Strep during the 35th to 37th week of gestation. This infection can be easily and successfully treated with penicillin during labor. […] Nearly 20 years ago, Hardy Diagnostics created Carrot Broth used for the detection of Group B Strep in pregnant women. […] The Carrot Broth system is inoculated with a swab from the pregnant female. Within 6 to 24 hours, an orange color will appear in the Carrot Broth tube if the Group B Strep bacteria is present.

• #2 Group B streptococcal infection – Wikipedia

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

  Group B streptococcal infection, also known as Group B streptococcal disease or just Group B strep infection, is the infectious disease caused by the bacterium Streptococcus agalactiae. […] GBS is characterized by the presence in the cell wall of the group B antigen of the Lancefield classification (Lancefield grouping) that can be detected directly in intact bacteria using latex agglutination tests. […] The CAMP test is also another important test for the identification of GBS. […] Identification of GBS could also be carried out easily using matrix-assisted laser desorption ionization-time of flight (MALDI-TOF) mass spectrometry. […] GBS is found in the gastrointestinal, genitourinary tract, and oropharynx of humans. […] GBS urinary tract infections, more than 100.000 CFU (colony forming units) /mL, may induce labour in pregnant women and cause premature delivery (preterm birth) and miscarriage and requires antibiotic treatment.

• #2 GBS | Diagnosis, and Treatment | Group B Strep | CDC

  http://medbox.iiab.me/modules/en-cdc/www.cdc.gov/groupbstrep/about/diagnosis.html

  Group B strep disease is diagnosed by taking samples of a babys sterile body fluids, such as blood or spinal fluid. These samples are cultured (bacteria grown in the laboratory) to see if group B strep bacteria are present, which can take a few days. […] For both early-onset (occurs in babies younger than 1 week old) and late-onset (occurs in babies 1 week through 3 months old) disease, if a group B strep infection is suspected, doctors will take a sample of the babys blood and spinal fluids or take a chest x-ray to confirm the diagnosis.

• #2 Group B streptococcal infection – Symptoms, diagnosis and treatment | BMJ Best Practice US

  https://bestpractice.bmj.com/topics/en-us/924

  1st tests to order include CBC, BUN, serum electrolytes, serum glucose, coagulation studies, LFTs, C-reactive protein (CRP), blood culture, cerebrospinal fluid (CSF) Gram stain, CSF culture, CSF cell count and differential, CSF glucose and protein, antigen detection in CSF, Gram stain and culture of other sterile body fluids, chest x-ray, plain joint and/or bone x-ray, CT head.

• #2 Group B Streptococcus (GBS) Infections: Practice Essentials, Background, Pathophysiology

  https://emedicine.medscape.com/article/229091-overview

  Group B streptococcus (GBS), also known as Streptococcus agalactiae, is recognized as a leading cause of postpartum infection and neonatal sepsis. […] Examination of patients with GBS infection may reveal the following findings: Lung consolidation, pleural effusion […] Laboratory tests performed for a patient with suspected GBS infection may include the following: Gram stain […] Isolation of GBS from blood, cerebrospinal fluid, and/or a site of local suppuration: the only method for diagnosing invasive GBS infection […] The following imaging studies may be performed for a patient suspected of having GBS infection: Chest radiography: May show pneumonia in elderly bedridden patient with fever, neurologic deficits, or other relevant symptoms; infiltrate or effusion may be seen […] Lumbar puncture for suspected GBS meningitis: First, rule out increased intracranial pressure with CT scanning, then perform lumbar puncture.

• #2 Streptococcus – Infectious Disease Advisor

  https://www.infectiousdiseaseadvisor.com/ddi/streptococcus/

  Evaluation of blood and cerebrospinal fluid cultures is recommended for the diagnosis of early-onset group B streptococcal disease in infants aged fewer than 7 days. For the diagnosis of late-onset group B streptococcal disease in infants aged 7 to 89 days, the guideline recommends blood, urine, and cerebrospinal fluid cultures, as well as radiographic imaging, magnetic resonance imaging, and bone or joint fluid culture in suspected cases of bone or joint infection. Depending on patient age and characteristics, various antibiotic treatments are recommended for the treatment of group B streptococcal disease in infants.

• #2 Streptococcus Group B – StatPearls – NCBI Bookshelf

  https://www.ncbi.nlm.nih.gov/books/NBK553143/

  Definitive testing: Culture of the organism from a sterile body site establishes the diagnosis of GBS infection. […] The initial therapy for suspected neonatal sepsis is ampicillin and an aminoglycoside, typically gentamicin. Both ampicillin and gentamicin have activity against GBS, which is the most common cause of neonatal sepsis. […] Intrapartum antibiotic prophylaxis (IAP) is indicated for all mothers with a positive GBS screening culture routinely obtained at 35 to 37 weeks gestation. Revised guidelines from 2010 also recommend IAP for pregnant women who have a history of GBS bacteriuria at any point during the current pregnancy or have a history of a previous infant with invasive GBS disease. […] To prevent transmission of GBS from mother to infant, all pregnant women should be screened for GBS colonization as part of their routine prenatal care late in their third trimester (usually between 35 and 37 weeks of gestation).

• #2 Prevention of Group B Streptococcal Early-Onset Disease in Newborns | ACOG

  https://www.acog.org/clinical/clinical-guidance/committee-opinion/articles/2020/02/prevention-of-group-b-streptococcal-early-onset-disease-in-newborns

  If the prenatal GBS culture result is unknown when labor starts, intrapartum antibiotic prophylaxis is indicated for women who have risk factors for GBS EOD. […] If a woman presents in labor at term with unknown GBS colonization status and does not have risk factors that are an indication for intrapartum antibiotic prophylaxis but reports a known history of GBS colonization in a previous pregnancy, the risk of GBS EOD in the neonate is likely to be increased. […] Intravenous penicillin remains the agent of choice for intrapartum prophylaxis, with intravenous ampicillin as an acceptable alternative. […] For women who are at high risk of anaphylaxis after exposure to penicillin, the laboratory requisitions for ordering antepartum GBS screening cultures (whether on paper or online in electronic medical records) should indicate clearly the presence of penicillin allergy.

• #2 Group B Streptococcus by PCR » Incyte Diagnostics

  https://www.incytediagnostics.com/laboratory-services/test-directory/TestDetails/group-b-streptococcus-by-pcr

  Group B Streptococcus by PCR […] Specimen Type Vaginal/rectal swab […] Using the recommended eSwab or other approved bacterial transport medium, begin by swabbing the lower vagina and the rectum through the anal sphincter. This increases the detection of colonization compared with sampling the cervix or vagina alone according to CDC 2010 recommendations. […] If the patient is allergic to penicillin, please order reflex susceptibility testing on the requisition to confirm the use of an appropriate alternative antibiotic. […] Susceptibility testing for positive GBS on penicillin-allergic patients is an additional 2-3 business days. […] Methodology Real-time polymerase chain reaction (PCR)

• #2 Group B Strep In Pregnancy: Test, Risks & Treatment

  https://my.clevelandclinic.org/health/diseases/11045-group-b-streptococcus–pregnancy

  Healthcare providers prevent GBS infection in your baby by treating you with intravenous (IV) antibiotics during labor and delivery. […] The most common antibiotic to treat group B strep is penicillin or ampicillin. […] Some babies still get GBS infections despite testing and antibiotic treatment during labor. Healthcare providers might take a sample of the baby’s blood or spinal fluid to see if the baby has GBS infection. If your baby has GBS, they’re treated with antibiotics through an IV.

• #2 Group B Strep Test: Procedure, What to Expect, Results

  https://www.verywellhealth.com/group-b-strep-test-5214841

  If the test result is positive, a healthcare provider will give you antibiotics through an IV (intravenous line) during labor, which is more effective than taking antibiotic pills. […] You will likely be given the treatment as soon as you are in active labor. Ideally, the antibiotics should be started at least four hours before delivery to give them the best chance at preventing infection in your baby. […] If a baby tests positive for GBS, they will be given antibiotics through an IV right away. […] A group B strep test is recommended for pregnant people to help prevent serious infections in newborns. It is a quick and simple test. If you test positive, you’ll be given antibiotics as soon as you go into labor. […] Group B strep is rare in the United States because most pregnant people have testing to identify the bacteria and get treatment to protect their baby.

• #2 Group B strep disease – Symptoms & causes – Mayo Clinic

  https://www.mayoclinic.org/diseases-conditions/group-b-strep/symptoms-causes/syc-20351729

  Medicine can prevent group B bacteria from spreading to your baby during labor or delivery. An antibiotic through a needle in a vein, also called an IV, is given to you when labor begins. The antibiotic is usually penicillin or a related medicine. […] Antibiotic treatment during labor also is recommended if you: Have a urinary tract infection. Delivered a previous baby with group B strep disease. Get a fever during labor. Haven’t delivered your baby within 18 hours of your water breaking. Go into labor before 37 weeks and haven’t been tested for group B strep.

• #2 Screening for Group B Strep Bacteria | Group B Strep | CDC

  https://www.cdc.gov/group-b-strep/testing/index.html

  Healthcare providers should screen all women for group B Streptococcus (group B strep, GBS) bacteria during each pregnancy. […] The test is simple and doesn’t hurt. […] Screening results help healthcare providers take steps to protect newborns from serious GBS infections. […] If pregnant, talk with your healthcare provider about getting screened. […] Screening women during pregnancy is one of the best ways to prevent GBS disease in the newborn’s first week of life. […] The results help healthcare providers know who’s at increased risk for having a baby who could get GBS disease. Healthcare providers can then take steps to decrease this risk. […] GBS bacteria screening should happen even when a cesarean birth is planned. […] Women who test positive for GBS bacteria aren’t sick. However, they’re at increased risk for passing the bacteria to their babies during birth. […] Healthcare providers give women who test positive antibiotics during labor to help protect their newborns from getting sick.

• #2 Strep B Test: MedlinePlus Medical TestLock

  https://medlineplus.gov/lab-tests/strep-b-test/

  If you are pregnant and results show you have GBS bacteria, you will be given antibiotics intravenously (by IV) during labor, at least four hours before delivery. This will prevent you from passing the bacteria to your baby. […] If your baby’s results show a GBS infection, he or she will be treated with antibiotics. If your provider suspects a GBS infection, he or she may treat your baby before test results are available. This is because GBS can cause serious illness or death.

• #2 Group B Strep Test: Procedure, What to Expect, Results

  https://www.verywellhealth.com/group-b-strep-test-5214841

  Group B strep (GBS) is a form of Streptococcus bacteria often present in the digestive or urinary tracts. It’s usually harmless in adults, but it can be a dangerous even deadly infection in a newborn. […] If you’re pregnant, your healthcare provider will recommend a group B strep test when you are in your 36th or 37th week. A simple test can determine if you have group B strep, which can be treated shortly before you deliver to help prevent infection in your baby. […] The test identifies if a pregnant person has GBS so that they can be treated with antibiotics before delivery. […] A pregnant person who is treated for GBS bacteria has a 1 in 4,000 chance of having a baby with GBS or will develop it soon after birth. Untreated pregnant people have a 1 in 200 chance of delivering a baby who will develop GBS.

• #2 Group B Strep Infections In Babies: Causes, Symptoms, and Treatment

  https://www.webmd.com/parenting/baby/baby-group-b-strep

  Your OB/GYN might do a urine culture early in your pregnancy to look for group B strep bacteria. You should be tested for it between your 35th and 37th weeks of pregnancy. The doctor will take a swab from your vagina and rectum and send it to a lab. A positive result means you carry this type of bacteria. […] If your newborn shows symptoms of this infection after birth, the doctor can take a sample of the baby’s blood or spinal fluid and send it to a lab. The lab will culture the bacteria to see if group B strep bacteria grow. This process can take a few days. A chest X-ray may also help doctors diagnose the infection in babies. […] Taking antibiotics during labor will prevent early-onset group B strep infections in your baby. But it wont lower the odds that your baby will develop the late-onset form. So keep note of any possible symptoms in your baby, particularly in the first three months of life.

• #2 Group B Streptococcus Infection in Babies | Cedars-Sinai

  https://www.cedars-sinai.org/health-library/diseases-and-conditions—pediatrics/g/group-b-streptococcus-infection-in-newborns.html

  If you have not been diagnosed with GBS, you may be given antibiotics before labor and birth if you have certain risk factors. These include: GBS infection in a previous baby, Labor or waters breaking (rupture of membranes) before 37 weeks (preterm), Rupture of membranes 18 hours or longer before delivery of a full-term pregnancy, Fever during labor. […] Some babies still get GBS even with testing and treatment. Research is being done to make vaccines to prevent GBS infection.

• #3 Prenatal Group B Strep (GBS) Screening – Testing.com

  https://www.testing.com/tests/prenatal-group-b-strep-gbs-screening/

  To screen a pregnant woman for the presence of group B streptococcus (GBS) in her vagina or rectum to determine the risk that she will pass the bacteria on to her newborn during labor and delivery, possibly resulting in a serious infection in her newborn called early-onset GBS […] Group B strep (GBS) is the common name for the bacterium Streptococcus agalactiae that can be present (colonizing) in the digestive tract and genital tract. […] GBS screening identifies the presence of the bacteria in the vaginal/rectal area of a pregnant woman. […] Approximately 25% of pregnant women carry group B strep in their rectum or vagina. […] Screening for GBS and appropriate treatment continues to be the best means for preventing GBS disease in newborns. […] A prenatal screening test for group B strep (GBS) is used to detect the presence of this bacteria in the vagina or rectum of pregnant women.

• #3 Strep B Test: MedlinePlus Medical TestLock

  https://medlineplus.gov/lab-tests/strep-b-test/

  Strep B, also known as group B strep (GBS), is a type of bacteria commonly found in the digestive tract, urinary tract, and genital area. […] A group B strep test checks for GBS bacteria. If you are pregnant and the test shows that you have GBS, taking antibiotics during labor can protect your baby from infection. […] If you are pregnant, a group B strep test is most often used to look for GBS bacteria during your routine prenatal screening. It may also be used to test infants who show signs of infection. […] You may need a strep B test if you are pregnant. The American College of Obstetricians and Gynecologists recommends GBS testing if you are pregnant. Testing is usually done between 36 and 38 weeks of pregnancy. If you go into labor earlier than 36 weeks, you may be tested at that time.

• #3 Group B Strep and Pregnancy (for Parents) | Nemours KidsHealth

  https://kidshealth.org/en/parents/groupb.html

  Pregnant women are routinely tested for GBS late in the pregnancy, usually between weeks 35 and 37. The test is simple, inexpensive, and painless. Called a culture, it involves using a large cotton swab to collect samples from the vagina and rectum. These samples are tested in a lab to check for GBS. The results are usually available in 1 to 3 days. […] If a test finds GBS, the woman is said to be „GBS-positive.” This means only that she has the bacteria in her body not that she or her baby will become sick from it. […] GBS infection in babies is diagnosed by testing a sample of blood or spinal fluid. But not all babies born to GBS-positive mothers need testing. Most healthy babies are simply watched to see if they have signs of infection.

• #3 Group B Streptococcus | Diagnostic Laboratory Services, Inc.

  https://dlslab.com/physicians/group-b-streptococcus/

  The first strategy consists of the collection of vaginal and rectal combination cultures at 35-37 weeks gestation to identify women with GBS colonization. […] To minimize false negative prenatal culture results, cultures should be taken at 35-37 weeks gestation. […] Optimal identification of GBS carriers is dependent not only on the timing of the culture but on the appropriate sites of collection. […] The laboratory performing the culture should use a broth selective for GBS. […] The rapid direct antigen detection methods (similar to the ones used for group A strep. in throats), are discouraged because of poor sensitivity. […] Colonies suspicious for GBS are identified by group specific antigen testing.

• #3 GBS Screening: An update on guidelines and methods

  https://www.contemporaryobgyn.net/view/gbs-screening-update-guidelines-and-methods

  Laboratory testing with culture media, which typically requires 36 to 72 hours of incubation time, remains the gold standard. […] The most recent CDC guidelines recommend rapid testing, which takes 30 minutes for results and has 90% accuracy. […] Rapid intrapartum GBS screening is ideal for women who have scant or no prenatal care, or those who present with preterm labor or PPROM. […] Wider use of DNA amplification assays may provide a benefit of higher sensitivity and minimize false negatives. […] Additional studies are needed to re-evaluate the optimal time for screening, because testing closer to the time of delivery may identify more women who are false-negative.

• #3 Hardy Diagnostics Strep B Carrot Broth Saving Lives

  https://www.rapidmicrobiology.com/news/hardy-diagnostics-strep-b-carrot-broth-saving-the-lives-of-newborns

  The advantage of the Hardy Carrot Broth is that it produces an easy to read bright color change and has a long shelf life. When compared to methods such as PCR or LIM broth, Carrot Broth significantly reduces the workload, the cost, and the time necessary to accurately identify GBS colonization in pregnant women.

• #3 Prevention of Group B Streptococcal Early-Onset Disease in Newborns | ACOG

  https://www.acog.org/clinical/clinical-guidance/committee-opinion/articles/2020/02/prevention-of-group-b-streptococcal-early-onset-disease-in-newborns

  Intravenous vancomycin remains the only pharmacokinetically and microbiologically validated option for intrapartum antibiotic prophylaxis in women who report a high-risk penicillin allergy and whose GBS isolate is not susceptible to clindamycin. […] Obstetric interventions, when necessary, should not be delayed solely to provide 4 hours of antibiotic administration before birth.

• #3 Group B Streptococcus (GBS) Infections Workup: Laboratory Studies, Imaging Studies, Other Tests

  https://emedicine.medscape.com/article/229091-workup

  Although rapid tests are available for assessment of maternal GBS colonization at the onset of labor, a study of 2 rapid tests by Daniels et al revealed that neither was sufficiently accurate to recommend their routine use in clinical practice. […] The authors concluded that screening using a rapid test was not cost effective based on its current sensitivity, specificity, and cost, and that intravenous antibiotic prophylaxis directed by screening with enriched culture at 35 to 37 weeks’ gestation is likely to be the most acceptable cost-effective strategy. […] Another study revealed that although intrapartum antibiotic prophylaxis was effective in preventing transmission of group B streptococci from the birthing parent to the newborn, prenatal cultures obtained by health care providers during routine care did not accurately predict the occurrence of infection found during labor. […] Schwope et al advise that, when collecting samples for GBS screening during a pelvic examination, practitioners should obtain the sample before using a bacteriostatic surgical lubricant.

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