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Streptococcus group B: an old bug with new dangers
Abstract:
Infection of the newborn infant with Group B hemolytic streptococcus is increasing in importance as other pathogens decline. Such infection may appear within the first 48 hours of life and resemble respiratory distress syndrome, or around the tenth day, when signs of meningeal irritation may be present. Early onset disease may be due to any of the five serotypes of the Group B streptococcus and is fatal in a high percentage of cases. Late onset infection usually is due to serotype III. The epidemiologic aspects of early and late infection appear to differ, and a nosocomial source may be involved in the latter. Penicillin prophylaxis may be useful.
Insights
Group B hemolytic streptococcus infections in newborns are rising, presenting as early-onset respiratory distress or late-onset meningitis. Serotype III is common in late-onset cases, and penicillin prophylaxis may be beneficial.
Area of Science:
- Neonatal infections
- Bacterial pathogenesis
- Streptococcal diseases
Background:
- Group B hemolytic streptococcus (GBS) infections are a growing concern in newborns, particularly as other pathogens decrease.
- GBS infections manifest in two primary forms: early-onset disease (within 48 hours) mimicking respiratory distress syndrome, and late-onset disease (around day 10) with signs of meningeal irritation.
- Early-onset GBS disease can be caused by multiple serotypes and has a high fatality rate, while late-onset infection is typically associated with serotype III.
Purpose of the Study:
- To highlight the increasing significance of Group B hemolytic streptococcus infections in neonates.
- To differentiate the clinical presentations and epidemiological characteristics of early-onset versus late-onset GBS infections.
- To explore potential preventive strategies, such as penicillin prophylaxis.
Main Methods:
- Review of clinical and epidemiological data on neonatal GBS infections.
- Analysis of serotype distribution in early-onset and late-onset disease.
- Consideration of potential sources, including nosocomial transmission.
Main Results:
- Group B hemolytic streptococcus infections are becoming more prevalent in newborns.
- Early-onset GBS disease presents shortly after birth with respiratory symptoms and has a high mortality rate.
- Late-onset GBS infection, often linked to serotype III, appears later and may involve meningitis, with potential nosocomial origins.
Conclusions:
- Group B hemolytic streptococcus poses a significant and increasing threat to newborns.
- Distinct clinical and epidemiological patterns exist for early-onset and late-onset GBS infections.
- Penicillin prophylaxis is a potential strategy to mitigate the impact of GBS infections in neonates.