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Updated: Jul 24, 2026

A Murine Model of Group B Streptococcus Vaginal Colonization
Published on: November 16, 2016
Role of postnatal penicillin prophylaxis in prevention of neonatal group B streptococcus infection
D M Patel1, P G Rhodes, M H LeBlanc
1Department of Pediatrics, University of Mississippi Medical Center, Jackson 39216, USA. dpatel@ped.umsmed.edu
Insights
Postnatal penicillin prophylaxis significantly reduces neonatal group B streptococcus (GBS) infections and sepsis-related deaths. Routine use of penicillin in newborns is effective in preventing GBS and improving infant survival rates.
Area of Science:
- Neonatal Medicine
- Infectious Disease Prevention
- Pediatric Pharmacology
Background:
- Neonatal group B streptococcus (GBS) infection poses a significant threat to infant health.
- Effective strategies for preventing GBS transmission and infection are crucial in neonatal care.
Purpose of the Study:
- To evaluate the efficacy of postnatal penicillin prophylaxis in preventing neonatal GBS infection.
- To assess the impact of penicillin prophylaxis on clinical sepsis and mortality rates in newborns.
Main Methods:
- A prospective study involving 10,998 infants.
- Infants were allocated to either a penicillin prophylaxis (PP) group or a no-penicillin prophylaxis (NPP) group using a block randomization method.
- Data on clinical sepsis, GBS infection, and sepsis-related deaths were collected and compared between the groups.
Main Results:
- The penicillin prophylaxis group showed a reduced incidence of clinical sepsis (1.7% vs. 2.5%, p < 0.01).
- GBS infection rates were significantly lower in the PP group (0.4% vs. 0.9%, p < 0.001).
- Deaths from sepsis decreased in infants receiving penicillin prophylaxis (0.1% vs. 0.3%, p < 0.05).
Conclusions:
- Routine postnatal penicillin prophylaxis is effective in decreasing the incidence of neonatal GBS infection.
- Penicillin prophylaxis demonstrates a significant role in reducing clinical sepsis and sepsis-related mortality in neonates.
Abstract:
This prospective study was designed to identify the role of postnatal penicillin prophylaxis in the prevention of neonatal group B streptococcus (GBS) infection. We studied 10 998 infants. Of these, 5389 were in the penicillin prophylaxis group (PP) and 5609 infants did not receive penicillin prophylaxis (NPP). Infants were allocated to treatment by month of birth, alternating 3-mo blocks or 2-mo blocks to the two groups after the first block was randomly assigned. The use of PP reduced the incidence of clinical sepsis (1.7% PP versus 2.5% NPP, p < 0.01), GBS infection (0.4% PP versus 0.9% NPP, p < 0.001) and deaths from sepsis (0.1% PP versus 0.3% NPP, p < 0.05). We conclude that the routine use of postnatal penicillin prophylaxis appears to be effective in reducing the incidence of clinical sepsis and death from sepsis in neonates.
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