Group B streptococcal infection: a review and update

Area of Science:

• Neonatal infectious diseases
• Bacterial pathogenesis
• Public health microbiology

Background:

• Group B Streptococcus (GBS) infections in infants have increased significantly since the 1970s.
• Neonatal GBS disease presents as early-onset or late-onset infections.
• Approximately 1% of infants born to colonized mothers develop GBS infection, with high mortality rates.

Purpose of the Study:

• To describe and discuss the challenges posed by the rising incidence of severe group B streptococcal disease in infants.
• To review the epidemiology, clinical presentation, and mortality associated with neonatal GBS infections.
• To evaluate potential preventive strategies for GBS disease in newborns.

Main Methods:

• Literature review and synthesis of existing data on GBS infections in infants.
• Analysis of disease incidence, transmission dynamics from mother to infant, and treatment outcomes.
• Examination of experimental evidence for preventive interventions.

Main Results:

• Infants born to GBS-colonized mothers have a high risk of acquiring the organism.
• Early-onset GBS disease has a 30% mortality rate even with prompt antibiotic treatment.
• Late-onset GBS disease, while less fatal, can occur up to two months after birth.

Conclusions:

• Effective preventive strategies are crucial to combat the rising threat of neonatal GBS disease.
• Active or passive immunization and intrapartum intravenous ampicillin are demonstrated protective measures.
• Prompt medical intervention is vital, but preventative approaches offer the best outcomes for infants at risk.