S. agalactiae (Group B Strep)
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Streptococcus agalactiae, also known as Lancefield’s group B streptococcus (GBS), is a gram-positive facultative anaerobe. Found in around 30% of healthy adult gastrointestinal tracts and vaginas, it can cause severe infections. The bacterium is the leading cause of septicaemia, pneumonia and meningitis in neonates. Additionally, a recent study showed that neonates of GBS+ women have a different microbiota composition compared to GBS-, possibly leading to disease development later in life.
Group B strep (streptococcus) is a common bacterium often carried in the intestines or lower genital tract. The bacterium is usually harmless in healthy adults. In newborns, however, it can cause a serious illness known as group B strep disease.
Group B strep can also cause dangerous infections in adults with certain chronic medical conditions, such as diabetes or liver disease. Older adults are at increased risk of illness due to group B strep, too.
If you're a healthy adult, there's nothing you need to do about group B strep. If you're pregnant, get a group B strep screening test during your third trimester. If you have group B strep, antibiotic treatment during labor can protect your baby.
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What does it mean if your S. agalactiae (Group B Strep) result is too high?
Many adults carry group B strep in their bodies — usually in the bowel, vagina, rectum, bladder or throat — and have no signs or symptoms.
In some cases, however, group B strep can cause a urinary tract infection or other more-serious infections. Signs and symptoms of infections that may be caused by group B strep include the following.
Urinary tract infection
- A strong, persistent urge to urinate
- A burning sensation or pain when urinating
- Passing frequent, small amounts of urine
- Urine that appears red, bright pink or cola colored — a sign of blood in the urine
- Pelvic pain
Prescribable antibiotics are included as prescribing options due to lack of detected antibiotic resistance genes. Physicians should use this as a guide and prescribe antibiotics based upon patient symptoms and medical history, including such factors as allergies, other medications, and pregnancy status:
Amoxicillin, Penicillin, Cephalexin
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