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Updated: Jun 5, 2026

Listeria monocytogenes Infection of the Brain
Published on: October 2, 2018
Listeria monocytogenes brain abscess in a patient with multiple myeloma
Adil A Al-Khatti1, Jaffar A Al-Tawfiq
1Oncology Unit, Dhahran Health Center, Saudi Aramco Medical Services Organization, Saudi Aramco, Dhahran, Saudi Arabia.
Abstract:
Listeria monocytogenes is an uncommon cause of illness in the general population. Meningoencephalitis is the most common central nervous system (CNS) manifestation of listeriosis. However, brain abscess represents 1-10% of all CNS listeriosis. To our knowledge, L. monocytogenes brain abscess in multiple myeloma patients has not been previously reported. Thus we report a 58-year-old male patient with multiple myeloma who developed a brain abscess due to L. monocytogenes. Due to a history of penicillin allergy, he was treated with intravenous trimethoprim/sulfamoxazole (TMP-SMX) for a total of 12 weeks, and gentamicin for the first two weeks, followed by oral therapy of TMP-SMX for a total of nine months. He is alive six and a half years after the diagnosis of myeloma with occasional brief seizures despite being on two anticonvulsants.
Insights
This case report details a rare brain abscess caused by Listeria monocytogenes in a multiple myeloma patient. The patient successfully recovered with a prolonged course of trimethoprim/sulfamethoxazole and gentamicin.
Area of Science:
- Infectious Diseases
- Neurology
- Hematology
Background:
- Listeria monocytogenes is an uncommon pathogen, with meningoencephalitis being the most frequent central nervous system (CNS) manifestation of listeriosis.
- Brain abscesses account for 1-10% of CNS listeriosis cases.
- Neurological complications in multiple myeloma patients are typically associated with other factors.
Observation:
- A 58-year-old male diagnosed with multiple myeloma developed a brain abscess.
- The abscess was confirmed to be caused by Listeria monocytogenes.
- The patient had a history of penicillin allergy.
Findings:
- This represents the first reported case of a Listeria monocytogenes brain abscess in a patient with multiple myeloma.
- The patient was treated with intravenous trimethoprim/sulfamethoxazole (TMP-SMX) and gentamicin, followed by an extended oral TMP-SMX regimen.
- The patient survived for over six years post-myeloma diagnosis, with controlled seizures.
Implications:
- Highlights the potential for Listeria monocytogenes to cause brain abscesses in immunocompromised patients, specifically those with multiple myeloma.
- Demonstrates the efficacy of TMP-SMX and gentamicin in treating this rare condition in penicillin-allergic patients.
- Emphasizes the importance of considering uncommon pathogens in the differential diagnosis of CNS infections in patients with hematological malignancies.
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