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Updated: Aug 8, 2026

Listeria monocytogenes Infection of the Brain
Published on: October 2, 2018
[Adult bacterial meningitis complicated by cerebral infarction: report of three cases]
Koji Takada1, Susumu Kojima, Takuya Hayashi
1Department of Neurology, Misyuku Hospital, 5-33-12 Kamimeguro, Meguro-ku, Tokyo 153-0051, Japan.
Abstract:
Fatality rates and the number of patients suffering from the after sequelae of bacterial meningitis have still remained high despite the development of new antibiotics. Cerebrovascular complications have been reported less frequently in adult cases than in child cases. We experienced 3 consecutive cases of bacterial meningitis in adults complicated by brain infarction. Primary causative organism were the Group B Streptococci in one case and the Streptococcus pneumoniae in other two cases. MRI, especially with FLAIR method and of coronal view, disclosed abnormal intensity areas near the brain surface. Conventional angiography and MR-angiography in the two cases showed tapering and stenosis of arteries. These cases suggest that routine use of MRI/ MRA in bacterial meningitis reveal neuro-vascular complications more frequently and easily. The benefits of adjunctive steroid therapy in the treatment of bacterial meningitis might be beneficial to suppression of these neurovascular complication cased by inflammatory vasculitis.
Insights
Bacterial meningitis in adults can lead to brain infarction, a serious complication. Early MRI/MRA scans can detect these neurovascular issues, potentially improving outcomes with steroid therapy.
Area of Science:
- Neurology
- Infectious Diseases
- Radiology
Background:
- Bacterial meningitis continues to cause high fatality and sequelae rates despite advances in antibiotic treatments.
- Cerebrovascular complications are less commonly reported in adult bacterial meningitis compared to pediatric cases.
Observation:
- Three adult patients with bacterial meningitis developed brain infarction.
- Causative organisms included Group B Streptococcus and Streptococcus pneumoniae.
- Magnetic Resonance Imaging (MRI), particularly FLAIR and coronal views, revealed abnormalities near the brain surface.
- Conventional angiography and MR-angiography (MRA) showed arterial tapering and stenosis in two cases.
Findings:
- Routine MRI/MRA in adult bacterial meningitis cases can more readily identify neurovascular complications.
- Brain infarction is a significant complication of bacterial meningitis in adults.
Implications:
- Early detection of neurovascular complications through MRI/MRA may lead to timely interventions.
- Adjunctive steroid therapy could potentially mitigate neurovascular complications associated with inflammatory vasculitis in bacterial meningitis.
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