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Published on: November 5, 2019
[Acute bacterial meningitis in adults, a 20 year overview.]
Laeknabladid
|January 13, 2010
Summary
Bacterial meningitis in adults is primarily caused by Neisseria meningitidis, with incidence varying by age. Streptococcus pneumoniae becomes more prevalent in older adults. Mortality rates remained stable, and third-generation cephalosporins are now the standard empiric treatment.
Area of Science:
- Epidemiology
- Infectious Diseases
- Microbiology
Context:
- Bacterial meningitis presents significant challenges in adult populations, yet research often focuses on pediatric cases or combined age groups.
- Understanding adult bacterial meningitis epidemiology is crucial for targeted public health interventions.
Purpose:
- To analyze the epidemiology, causative organisms, treatment patterns, and outcomes of bacterial meningitis in adults in Iceland.
- To provide insights into age-specific etiological shifts and evolving therapeutic strategies for adult bacterial meningitis.
Summary:
- A 20-year study in Iceland identified 123 adult bacterial meningitis cases, with Neisseria meningitidis (54%) and Streptococcus pneumoniae (20%) as primary pathogens.
- Causative organism distribution varied significantly with age: N. meningitidis dominated younger adults, while S. pneumoniae and Listeria monocytogenes were more common in older adults (≥45 years).
- Overall mortality was 19.1% and unchanged, with a high prevalence (39%) of underlying conditions. Empiric therapy shifted from penicillin/ampicillin to third-generation cephalosporins over the study period.
Impact:
- This study highlights the age-dependent etiology of bacterial meningitis in adults, informing age-specific diagnostic and treatment guidelines.
- The shift in empiric antibiotic use reflects evolving clinical practice and emphasizes the importance of monitoring treatment efficacy.
- Findings contribute to a better understanding of adult bacterial meningitis, aiding in the development of more effective prevention and management strategies.
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