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Updated: Aug 12, 2026

A Murine Model of Group B Streptococcus Vaginal Colonization
Published on: November 16, 2016
Group B streptococcal meningitis in adults: report of twelve cases and review
Abstract:
Group B streptococcus (GBS) is the leading etiologic agent of bacterial meningitis and sepsis during the neonatal period, but it is an infrequent cause of meningitis in adults. We report 12 episodes of group B streptococcal meningitis in adults and review 52 cases reported in the literature. A total of 24 men and 40 women were included in the study; the mean age (+/- SD) was 49.2 +/- 20.5 years (range, 17-89 years). All the patients had cerebrospinal fluid cultures positive for GBS. Eighty-six percent of the patients had comorbid conditions, 50% had a distant focus of infection, and blood cultures yielded GBS for 78.7%. The overall case-fatality rate was 34.4% (22 patients). Factors associated with a poor outcome were advanced mean age (+/- SD) (61.5 +/- 17.4 years vs. 42.8 +/- 19.2 years; P = .0003) and the presence of complications on admission (P = .0001). Seven percent of survivors had neurological sequelae. Group B streptococcal meningitis in adults has become increasingly frequent in recent years; it tends to occur in patients with severe underlying conditions and is associated with a high case-fatality rate. Factors associated with a poor prognosis are advanced age and the occurrence of neurological and extraneurological complications.
Insights
Group B streptococcus (GBS) meningitis is increasingly common in adults, often affecting those with severe health issues. This serious infection carries a high fatality rate, with older age and complications worsening prognosis.
Area of Science:
- Infectious Diseases
- Neurology
- Bacteriology
Background:
- Group B streptococcus (GBS) is a primary cause of neonatal bacterial meningitis and sepsis.
- GBS meningitis is historically infrequent in adult populations.
- Recent trends suggest an increasing incidence of GBS meningitis in adults.
Purpose of the Study:
- To report on 12 adult cases of GBS meningitis.
- To review 52 previously reported adult GBS meningitis cases.
- To analyze risk factors and outcomes associated with adult GBS meningitis.
Main Methods:
- Retrospective analysis of 12 institutional cases.
- Literature review of 52 reported adult GBS meningitis cases.
- Statistical analysis to identify factors associated with poor outcomes.
Main Results:
- A total of 64 adult patients were analyzed (mean age 49.2 years).
- 86% had comorbid conditions; 78.7% had positive blood cultures.
- Overall case-fatality rate was 34.4%; advanced age and complications predicted poor outcomes.
Conclusions:
- Adult GBS meningitis is an emerging concern, particularly in patients with significant underlying health problems.
- The condition is associated with a high mortality rate.
- Advanced age and the presence of complications are significant predictors of mortality and poor prognosis.
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