A nurse is admitting a client who is at 39 weeks of gestation and in active labor. The client reports being positive for group B streptococcus (GBS) when screened at 36 weeks of gestation. Which of the following actions should the nurse expect to take?

Choice A rationale Group B Streptococcus (GBS) colonization in a pregnant client does not typically necessitate a cesarean birth. The primary concern with GBS is the risk of vertical transmission to the neonate during vaginal birth, which can lead to severe neonatal infections like sepsis, meningitis, or pneumonia. Cesarean section is generally reserved for obstetric indications and does not eliminate the risk of GBS transmission if membranes rupture. Choice B rationale Intravenous antibiotic prophylaxis is the cornerstone of preventing neonatal GBS disease in colonized mothers. The recommended antibiotics, typically penicillin or ampicillin, are administered during labor once ruptured membranes or active labor commence. This intrapartum treatment significantly reduces bacterial colonization in the birth canal, thereby minimizing the neonate's exposure to the bacteria during passage. Choice C rationale A vaginal culture for GBS is typically performed between 36 and 37 weeks of gestation as part of routine prenatal screening. If the client has already been screened and identified as GBS positive at 36 weeks, repeating the culture during active labor is not indicated as the colonization status is already known, and the focus shifts to prophylaxis. Choice D rationale Metronidazole is an antibiotic primarily effective against anaerobic bacteria and certain parasites. It is not the drug of choice for Group B Streptococcus prophylaxis. Penicillin or ampicillin are the preferred antibiotics for GBS intrapartum prophylaxis due to their effectiveness against GBS and their favorable safety profile for both the mother and the fetus.