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Updated: Jan 19, 2026

Murine Oropharyngeal Aspiration Model of Ventilator-associated and Hospital-acquired Bacterial Pneumonia
Published on: June 28, 2018
Community-acquired pneumonia in patients with bacterial meningitis: a prospective nationwide cohort study
A H A Figueiredo1, M C Brouwer1, M W Bijlsma1
1Department of Neurology, Amsterdam Neuroscience, Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands.
Objective:
Pneumonia is considered a focus of infection in patients presenting with community-acquired bacterial meningitis but the impact on disease course is unclear. The aim was to study presenting characteristics, clinical course and outcome of meningitis patients with co-existing pneumonia on admission.
Methods:
We evaluated adult patients with community-acquired bacterial meningitis with pneumonia on admission in a nationwide, prospective cohort performed from March 2006 to June 2017. We performed logistic regression analysis to identify clinical characteristics predictive of pneumonia on admission, and to quantify the effect of pneumonia on outcome.
Results:
Pneumonia was diagnosed on admission in 315 of 1852 (17%) bacterial meningitis episodes and confirmed by chest X-ray in 256 of 308 (83%) episodes. Streptococcus pneumoniae was the causative organism in 256 of 315 episodes (81%). Pneumonia on admission was associated with advanced age (OR 1.03 per year increase, 95% CI 1.02-1.04, p < 0.001), alcoholism (OR 1.96, 95% CI 1.23-3.14, p 0.004), cancer (OR 1.54, 95% CI 1.12-2.13, p 0.008), absence of otitis or sinusitis (OR 0.44, 95% CI 0.32-0.59, p < 0.001) and S. pneumoniae (OR 2.14, 95% CI 1.55-2.95, p < 0.001) in the multivariate analysis. An unfavourable outcome defined as a score of 1-4 on the Glasgow Outcome Scale was observed in 172 (55%) episodes and 87 patients (28%) died. Pneumonia on admission was independently associated with unfavourable outcome and mortality in the multivariate analysis (OR 1.48, 95% CI 1.12-1.96; p 0.005).
Conclusion:
Pneumonia on admission in bacterial meningitis is a frequent coexisting infection and is independently associated with unfavourable outcome and mortality.
Insights
Pneumonia occurring with bacterial meningitis is common and significantly worsens patient outcomes. This co-infection increases the risk of unfavorable outcomes and mortality in patients with community-acquired bacterial meningitis.
Area of Science:
- Infectious Diseases
- Pulmonology
- Critical Care Medicine
Background:
- Community-acquired bacterial meningitis can present with concurrent pneumonia, a focus of infection.
- The impact of pneumonia on the clinical course and outcomes of bacterial meningitis is not well understood.
Purpose of the Study:
- To investigate the presenting characteristics of bacterial meningitis patients with pneumonia.
- To analyze the clinical course and outcomes of meningitis patients who also have pneumonia upon admission.
Main Methods:
- A nationwide prospective cohort study of adult patients with community-acquired bacterial meningitis and pneumonia on admission was conducted from March 2006 to June 2017.
- Logistic regression analysis was used to identify predictors of pneumonia and its effect on outcomes.
Main Results:
- Pneumonia was present in 17% of bacterial meningitis episodes, frequently caused by Streptococcus pneumoniae.
- Pneumonia on admission was associated with older age, alcoholism, cancer, and S. pneumoniae infection.
- An unfavorable outcome (Glasgow Outcome Scale 1-4) occurred in 55% of cases, with a 28% mortality rate, both independently linked to pneumonia.
Conclusions:
- Pneumonia is a frequent co-infection in bacterial meningitis.
- Pneumonia at admission is an independent predictor of unfavorable outcomes and increased mortality in bacterial meningitis patients.
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