Related Experiment Video
Updated: Aug 10, 2026

A Murine Model of Group B Streptococcus Vaginal Colonization
Published on: November 16, 2016
Prophylaxis for neonatal group B streptococcus infections
1Department of Pediatrics, University of Texas, Southwestern Medical Center at Dallas 75235-9063, USA.
Insights
Group B Streptococcus (GBS) prevention in neonates is highly effective. Implementing intrapartum chemoprophylaxis can prevent over 80% of early-onset GBS disease cases.
Area of Science:
- Neonatal infectious diseases
- Microbiology and epidemiology of Group B Streptococcus
Background:
- Group B Streptococcus (GBS) is the leading cause of invasive bacterial disease in neonates.
- Two decades of research have focused on GBS prevention strategies.
Purpose of the Study:
- Review GBS microbiology, epidemiology, and clinical manifestations.
- Summarize studies leading to the 1996 consensus guidelines for perinatal GBS disease prevention.
Main Methods:
- Review of scientific literature on GBS.
- Analysis of studies on prevention strategies and intrapartum chemoprophylaxis.
Main Results:
- Intrapartum chemoprophylaxis with penicillin or ampicillin, when consistently implemented, prevents over 80% of early-onset GBS disease.
- Current debates focus on universal screening vs. risk-based strategies and neonate management.
Conclusions:
- Intrapartum chemoprophylaxis is a highly effective strategy for preventing neonatal GBS disease.
- Guidelines are expected to evolve with further experience and ongoing research.
Abstract:
For the past two decades, group B streptococcus (GBS) has been the pathogen most frequently isolated from neonates with invasive bacterial disease. This is a review of the relevant aspects of microbiology, epidemiology, and clinical manifestations and a summary of the major studies of prevention strategies that led to the development of the 1996 consensus guidelines for prevention of perinatal GBS disease. There is now sufficient experience to know that > or = 80% of cases of early onset GBS disease can be prevented when a protocol for intrapartum chemoprophylaxis with either penicillin or ampicillin is implemented consistently within a delivery population. Present controversies revolve around the choice between a universal screening-based strategy versus a risk factor-based strategy, optimal management of the neonate born to a mother who received intrapartum antimicrobial prophylaxis, and effective methods to ensure implementation. The present guidelines will likely be refined as additional experience is gained.
Related Concept Videos
Healthcare Associated Infections II: Preventive Measures
The best practices for preventing healthcare-associated infections include hand hygiene, patient risk...
Transmission-based Precautions II: Airborne and Protective Environment
Airborne precautions:
Use airborne precautions when treating patients known or suspected to have diseases that spread through the air—for example, tuberculosis or measles. These organisms are present in smaller droplets expelled by an infected person and...
Development of the Oral Microbiota
Streptococcal Pharyngitis
Respiratory Syncytial Virus Disease
Bacterial Meningitis II: Pathophysiology

