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Updated: Jun 22, 2026

Subcutaneous Infection of Methicillin Resistant Staphylococcus Aureus (MRSA)
Published on: February 9, 2011
Skin and soft tissue infection: microbiology and epidemiology
1Microbiology and Communicable Disease, Royal Hampshire County Hospital, Winchester SO225DG, UK. matthew.dryden@wehct.nhs.uk
Abstract:
Skin and soft tissue infections (SSTIs) are common and range in severity from minor, self-limiting, superficial infections to life-threatening diseases requiring all the resources of modern medicine. The classification of SSTIs can be based on the anatomical site, clinical severity or microbial cause, but some classifications divide SSTIs into complicated and uncomplicated infections. Community-acquired SSTIs are most commonly caused by staphylococci or streptococci, but almost any organism is capable of causing inflammation within soft tissue. Recent epidemiological trends have shown an increase not only in healthcare-associated meticillin-resistant Staphylococcus aureus (MRSA), but also in MRSA acquired in the community. Many of the latter strains produce exotoxins and are epidemiologically distinct from healthcare-acquired strains. Factors that may affect the microbial cause include underlying disease such as diabetes or immune dysfunction; hospital attendance, injecting drug use, travel, animal contact and environmental contamination.
Insights
Skin and soft tissue infections (SSTIs) are common bacterial infections. Emerging community-acquired methicillin-resistant Staphylococcus aureus (MRSA) strains present unique challenges and require careful consideration of patient factors.
Area of Science:
- Infectious Diseases
- Microbiology
- Epidemiology
Background:
- Skin and soft tissue infections (SSTIs) represent a spectrum of conditions, from minor to life-threatening.
- Classification can be based on site, severity, or microbial cause, often categorized as complicated or uncomplicated.
- Community-acquired SSTIs are typically caused by staphylococci or streptococci, but other pathogens can be involved.
Purpose of the Study:
- To review the epidemiology and characteristics of skin and soft tissue infections.
- To highlight the increasing prevalence of community-acquired methicillin-resistant Staphylococcus aureus (MRSA).
- To discuss factors influencing the microbial etiology of SSTIs.
Main Methods:
- Literature review of epidemiological trends in SSTIs.
- Analysis of microbial causes, including common and emerging pathogens.
- Identification of risk factors associated with SSTI development.
Main Results:
- Staphylococci and streptococci are the most frequent causes of community-acquired SSTIs.
- A rise in both healthcare-associated and community-acquired MRSA has been observed.
- Community-acquired MRSA strains may possess distinct exotoxin profiles compared to healthcare-associated strains.
Conclusions:
- SSTIs are a significant public health concern with evolving etiological patterns.
- The increasing incidence of community-acquired MRSA necessitates updated diagnostic and treatment strategies.
- Patient-specific factors, including underlying conditions and exposures, play a crucial role in SSTI causation.
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