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Updated: May 3, 2026

Subcutaneous Infection of Methicillin Resistant Staphylococcus Aureus MRSA
Published on: February 9, 2011
A Case of Acute Pyogenic Sacroiliitis and Bacteremia Caused by Community-Acquired Methicillin-Resistant
Suyoung Kim1, Kang Lock Lee1, Hae Lim Baek1
1Department of Internal Medicine, Gachon University Gil Medical Center, Incheon, Korea.
Abstract:
Pyogenic sacroiliitis is a rare osteoarticular infection, occurring most frequently in children and young adults. Diagnosis of the disease is challenging because of a general lack of awareness of the disease and its nonspecific signs and symptoms. Staphylococcus aureus is the most common causative bacteria in pyogenic sacroiliitis. Methicillin-resistant S. aureus (MRSA) has typically been considered a hospital-associated pathogen; however, community-acquired (CA)-MRSA infections are becoming increasingly common in Korea. We report the first domestic case of acute pyogenic sacroiliitis with abscess and bacteremia caused by CA-MRSA. The pathogen carried the type IV-A staphylococcal cassette chromosome mec (SCCmec) without the Panton-Valentine leukocidin (PVL) gene, and was identified as sequence type (ST) 72 by multilocus sequence typing.
Insights
This study reports the first case of community-acquired Methicillin-resistant Staphylococcus aureus (CA-MRSA) causing pyogenic sacroiliitis in Korea. This rare infection presented with abscess and bacteremia, highlighting evolving MRSA epidemiology.
Area of Science:
- Infectious Diseases
- Osteoarticular Infections
- Microbiology
Background:
- Pyogenic sacroiliitis is a rare osteoarticular infection, often challenging to diagnose due to non-specific symptoms.
- Staphylococcus aureus is the primary bacterial cause, with Methicillin-resistant S. aureus (MRSA) increasingly prevalent.
- Community-acquired (CA)-MRSA is a growing concern in Korea.
Purpose of the Study:
- To report the first domestic case of acute pyogenic sacroiliitis caused by CA-MRSA.
- To characterize the specific strain of CA-MRSA involved in this infection.
Main Methods:
- Case report of a patient with acute pyogenic sacroiliitis, abscess, and bacteremia.
- Bacterial identification and characterization, including SCCmec type and PVL gene detection.
- Multilocus sequence typing (MLST) for pathogen classification.
Main Results:
- The causative agent was identified as CA-MRSA.
- The MRSA strain carried type IV-A SCCmec and lacked the PVL gene.
- The pathogen was classified as sequence type (ST) 72.
Conclusions:
- This case represents the first documented instance of CA-MRSA causing pyogenic sacroiliitis with associated abscess and bacteremia in Korea.
- The findings underscore the changing landscape of MRSA infections, extending beyond hospital settings.
- Further surveillance is needed to understand the prevalence and clinical impact of CA-MRSA in osteoarticular infections.
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