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Updated: Jul 14, 2026

Listeria monocytogenes Infection of the Brain
Published on: October 2, 2018
Sepsis and meningitis due to Listeria monocytogenes
Orhan Yildiz1, Bilgehan Aygen, Duygu Esel
1Department of Infectious Diseases, Faculty of Medicine, Erciyes University, 38039 Kayseri, Turkey. oyildiz@erciyes.edu.tr
Insights
Immunosuppression significantly increases the risk of severe listeriosis, particularly sepsis and meningitis. This condition, caused by Listeria monocytogenes, has a high fatality rate in immunocompromised adults.
Area of Science:
- Infectious Diseases
- Immunology
- Clinical Medicine
Background:
- Listeriosis, caused by Listeria monocytogenes, is an infection that can lead to severe complications.
- Immunocompromised individuals are at higher risk for invasive listeriosis.
Purpose of the Study:
- To investigate the clinical presentation of severe listeriosis in immunocompromised patients.
- To identify risk factors and outcomes associated with listeriosis in this population.
Main Methods:
- Retrospective review of nine adult cases of listeriosis between 1991 and 2002.
- Analysis of clinical data, including underlying conditions, therapies, symptoms, and outcomes.
- Isolation of L. monocytogenes from blood, peritoneal fluid, or cerebrospinal fluid (CSF).
Main Results:
- Listeriosis presented as sepsis (5 cases) or meningitis (4 cases).
- All patients had underlying conditions (e.g., hematologic malignancy, diabetes); 55.6% received immunosuppressive therapy.
- Mean age was 60 years; common symptoms included fever and lethargy. Mortality rate was 33.3%, higher in meningitis (50%) than sepsis (20%).
Conclusions:
- Immunosuppressive therapy is a significant predisposing factor for listeriosis.
- Sepsis and meningitis are common presentations in immunocompromised patients with listeriosis.
- Listeriosis in this group has a high case-fatality rate, especially for food-borne illnesses.
Purpose:
This study focused on the effect of immuno-compromising conditions on the clinical presentation of severe listerial infection.
Patients And Methods:
Nine human listeriosis cases seen from 1991-2002 were reviewed. All adult patients, from whose blood, peritoneal fluid or cerebrospinal fluid (CSF) the L. monocytogenes was isolated, were included in this retrospective study.
Results:
Listeriosis presented as primary sepsis with positive blood cultures in 5 cases and meningitis with positive CSF cultures in 4 cases. All of these patients had at least one underlying disease, most commonly, hematologic malignancy, diabetes mellitus, amyloidosis and hepatic cirrhosis; 55.6% had received immunosuppressive or corticosteroid therapy within a week before the onset of listeriosis. The patients were adults with a mean age of 60 years. Fever, night sweats, chills and lethargy were the most common symptoms; high temperature (> 38 degrees C), tachycardia, meningeal signs and poor conditions in general were the most common findings on admission. The mortality rate was 33.3% and was strictly associated with the severity of the underlying disease. Mortality differences were significant between sepsis (20%) and meningitis (50%) patients.
Conclusion:
Listeriosis as an uncommon infection in our region and that immuno- suppressive therapy is an important pre-disposing factor of listeriosis. Sepsis and meningitis were more common in this group of patients and had the highest case-fatality rate for food-borne illnesses.
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