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Updated: Aug 7, 2026

Listeria monocytogenes Infection of the Brain
Published on: October 2, 2018
Acute symptomatic hydrocephalus in Listeria monocytogenes meningitis
Chun Chieh Yang1, Chao Hung Yeh, Tsung Chia Tsai
1Department of Intensive Care Medicine, Chi-Mei Medical Center, Tainan County, Taiwan.
Abstract:
Listeria monocytogenes meningitis appears to have increased in incidence. Although most reported cases of listeriosis involve the central nervous system, brain computed tomography is usually normal. Hydrocephalus is a common complication of tuberculous meningitis, which has a high prevalence in Taiwan. However, patients with L. monocytogenes meningitis rarely develop the complication of symptomatic hydrocephalus. We report a patient with L. monocytogenes meningitis who presented with persistent alteration of consciousness after appropriate antimicrobial therapy. Follow-up brain computed tomography revealed acute hydrocephalus. An Ommaya reservoir was implanted, and daily drainage of the cerebrospinal fluid was performed. The patient improved gradually and his mental status recovered completely 4 days later. This case should remind physicians to be aware of the possible occurrence of hydrocephalus in L. monocytogenes meningitis and that prompt cerebrospinal fluid drainage may achieve a good outcome.
Insights
Listeria monocytogenes meningitis can lead to acute hydrocephalus, a rare complication. Prompt cerebrospinal fluid drainage via an Ommaya reservoir can significantly improve patient outcomes.
Area of Science:
- Neurology
- Infectious Diseases
- Neurosurgery
Background:
- Listeria monocytogenes meningitis is increasingly reported.
- Central nervous system involvement is common in listeriosis, but neuroimaging is often normal.
- Hydrocephalus is a known complication of tuberculous meningitis, prevalent in Taiwan.
Observation:
- A patient with Listeria monocytogenes meningitis experienced persistent altered consciousness despite antimicrobial treatment.
- Brain computed tomography revealed acute hydrocephalus, a rare complication in this context.
- Symptomatic hydrocephalus is uncommon in Listeria monocytogenes meningitis.
Findings:
- The patient underwent Ommaya reservoir implantation for daily cerebrospinal fluid drainage.
- Gradual clinical improvement and complete mental status recovery occurred within 4 days.
- This case highlights the potential for hydrocephalus in Listeria monocytogenes meningitis.
Implications:
- Physicians should consider hydrocephalus as a possible complication of Listeria monocytogenes meningitis.
- Early recognition and intervention, such as cerebrospinal fluid drainage, are crucial for favorable outcomes.
- This case underscores the importance of vigilant monitoring for neurological complications in bacterial meningitis.
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Bacterial Meningitis I: Introduction
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