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Updated: Jun 19, 2026

Subcutaneous Infection of Methicillin Resistant Staphylococcus Aureus (MRSA)
Published on: February 9, 2011
[Community-acquired meningitis due to methicillin susceptible Staphylococcus aureus]
1Service de maladies infectieuses et tropicales, CHU Dupuytren, avenue Martin-Luther-King, Limoges, France. pauline.pinet@noos.fr
Unlabelled:
Meningitis due to Staphylococcus aureus is infrequent. MRSA is mainly found after neurosurgery, but MSSA may be involved in community-acquired meningitis. However, this kind of infection is not widely reported, despite its severity.
Methods:
We describe the characteristics of five patients hospitalized in our ward over a period of 18 months who presented with community-acquired meningitis due to MSSA.
Results:
The patients were three men and two women with a mean age of 62 years. One patient was immunosuppressed. Neurological signs were present at the onset for only two patients. In all cases, there were extraneurological localizations of the infection, mainly in bones (spondylodiscitis, epidural abscess, arthritis) but also lung infection. Three patients with meningeal inflammation also presented with confusion. CSF analysis revealed less than 950 white blood cells, hyper-CSF-proteins, and hypo-CSF-glucose. Bacteraemia was present in all patients. The source of infection was never determined. The evolution was good for all patients with a prolonged antibiotic course. The analysis of genetic determinants for three strains revealed the presence of TSST-1 which could account for the severity of the disease.
Conclusion:
Community-acquired MSSA meningitis is a serious infection, occurring in patients without risk factors. Hematogenous dissemination leads to multiple tissue infection. A long course of antibiotics, with high doses, is needed to treat meningitis but also extraneurological localizations. The role of TSST-1 needs to be confirmed in other patients.
Insights
Community-acquired meningitis caused by methicillin-susceptible Staphylococcus aureus (MSSA) is rare but severe. This infection often spreads to other tissues, requiring prolonged antibiotic treatment for a good outcome.
Area of Science:
- Infectious Diseases
- Neurology
- Microbiology
Context:
- Meningitis caused by Staphylococcus aureus is uncommon.
- Methicillin-resistant Staphylococcus aureus (MRSA) is typically associated with neurosurgery, while methicillin-susceptible Staphylococcus aureus (MSSA) can cause community-acquired meningitis.
- Community-acquired MSSA meningitis is underreported despite its severity.
Purpose:
- To describe the characteristics of community-acquired meningitis due to MSSA.
- To analyze patient demographics, clinical presentation, laboratory findings, and treatment outcomes.
Summary:
- Five patients with community-acquired MSSA meningitis were studied over 18 months.
- Patients presented with extraneurological infections (bone, lung) and bacteremia; neurological signs were infrequent at onset.
- Cerebrospinal fluid analysis showed characteristic inflammatory markers. All patients recovered with prolonged antibiotic therapy.
- The presence of TSST-1 in some strains may contribute to disease severity.
Impact:
- Highlights community-acquired MSSA meningitis as a serious infection.
- Emphasizes the need for prompt diagnosis and aggressive treatment, including addressing extraneurological foci.
- Suggests further investigation into the role of TSST-1 in MSSA meningitis pathogenesis.
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