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Updated: Jul 19, 2026

Subcutaneous Infection of Methicillin Resistant Staphylococcus Aureus (MRSA)
Published on: February 9, 2011
Skin lesions in barracks: consider community-acquired methicillin-resistant Staphylococcus aureus infection instead
Benedict B Pagac1, Ronald W Reiland, David T Bolesh
1Department of Entomology, University of California, Riverside 92521, USA.
Abstract:
Recent outbreaks of mysterious skin lesions on multiple personnel at several military facilities were initially blamed on spiders. Requests were made for pest inspection and control to remedy the situation. Greater scrutiny of the situation led to a hypothesis that instead of spiders, an infectious outbreak of community-acquired methicillin-resistant Staphylococcus aureus (CA-MRSA) should be investigated as the etiology. Subsequent culturing of the lesions on personnel at one facility confirmed this bacterial etiology. Barracks, as well as other close quarter military living conditions, are ripe environments for the establishment, persistence, and spread of CA-MRSA. Military medical personnel should consider CA-MRSA as a more likely etiologic agent than spider bites for cutaneous eruptions in which there are multiple lesions on one person or multiple patients with similar lesions.
Insights
Mysterious military skin lesions were initially blamed on spiders. Investigations revealed community-acquired methicillin-resistant Staphylococcus aureus (CA-MRSA) bacterial infections as the true cause in close-living military personnel.
Area of Science:
- Military medicine
- Infectious diseases
- Dermatology
Background:
- Outbreaks of unexplained skin lesions occurred among military personnel.
- Initial investigations focused on spider bites, prompting pest control measures.
Purpose of the Study:
- To investigate the etiology of widespread skin lesions in military personnel.
- To determine if community-acquired methicillin-resistant Staphylococcus aureus (CA-MRSA) was responsible.
Main Methods:
- Clinical observation of skin lesions.
- Bacterial culturing of lesions from affected individuals.
- Epidemiological assessment of living conditions.
Main Results:
- Bacterial cultures confirmed the presence of CA-MRSA in lesions.
- Spider bites were ruled out as the primary cause.
- Close-quarter military living environments were identified as conducive to CA-MRSA spread.
Conclusions:
- CA-MRSA is a more likely cause of military skin eruptions than spider bites.
- Military medical staff should consider CA-MRSA in differential diagnoses for cutaneous lesions.
- Preventative strategies targeting CA-MRSA transmission in barracks are recommended.
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