Test Results For Group B Strep. A woman may test positive at certain times and negative at others. They are gram ve catalase -ve beta hemolysis oxidase -ve cocci bacterium.
A positive test for GBS in a healthy pregnant woman means that the bacteria are currently present in her vagina andor rectum. A positive result for Group B streptococcus on urine culture may be a risk factor for preterm labour premature rupture of the membranes intrapartum fever and chorioamnionitis Kessous et al 2012. 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.
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.
To ensure accurate results for susceptibility testing of group B Streptococcus GBS laboratories should include a test for detection of inducible clindamycin resistance. The double-disk diffusion method D-zone test is recommended for testing erythromycin-resistant and clindamycin-susceptible GBS that are from penicillin-allergic women at. If a women is known to carry group B Strep in her current pregnancy then she will be offered antibiotics from onset of labour which will minimise the risk of her newborn baby developing a group B Strep infection. Since they naturally live in the gastrointestinal tract the bacteria can come back after taking antibiotics.