Bacterial meningitis in high-risk populations

Objectives: To investigate the characteristics, management, and outcomes of bacterial meningitis in specific high-risk groups, including multiple myeloma patients, inflammatory bowel disease (IBD) patients, HIV-infected individuals, and those with concurrent vertebral osteomyelitis.
Methods: Utilized data from two prospective cohort studies: the MeninGene study and the PACEM study.
• MeninGene study: Included adults with bacterial meningitis in the Netherlands since Jan 1, 2006.
• PACEM study: Conducted at the Academic Medical Center, Amsterdam, The Netherlands, including adults with suspected central nervous system infections who underwent CSF examination.
Data collected through online case-record forms, including patient history, symptoms, laboratory findings, clinical course, and treatment.
Results:
• Chapter 2: Multiple myeloma patients with bacterial meningitis experienced high mortality and morbidity. Clinical features may be absent, necessitating a low threshold for CSF examination and empirical treatment.
• Chapter 3: IBD patients with bacterial meningitis, especially those on anti-TNF agents, were at increased risk of L. monocytogenes infection. Avoidance of potential sources of L. monocytogenes is crucial.
• Chapter 4: HIV-infected patients with suspected CNS infections had a diverse spectrum of CNS infections, with CSF leukocyte count being the most reliable predictor.
• Chapter 5: Concurrent vertebral osteomyelitis in bacterial meningitis patients requires early diagnosis for appropriate management, with Streptococcus pneumoniae being a common causative pathogen.
Conclusion: These findings provide valuable insights into the management of bacterial meningitis in high-risk populations, emphasizing the importance of early diagnosis, appropriate treatment, and preventive measures to improve patient outcomes.