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Updated: Oct 10, 2026
Subcutaneous Infection of Methicillin Resistant Staphylococcus Aureus (MRSA)
Published on: February 9, 2011
MRSA carriage: the relationship between community and healthcare setting. A study in an Italian hospital
L Scudeller1, O Leoncini, S Boni
1IRCCS Policlinico San Matteo, Istituto di Clinica delle Malattie Infettive, Pavia.
Abstract:
From May 1997 to June 1998, all patients admitted to the study institution were screened at entry for MRSA carriage (both colonization and infection). Eighty-six MRSA carriers were identified; of these, 85 were nasal carriers. Risk factors were compared to those of 86 controls. Although the vast majority of both carriers and controls had at least one previous hospital stay, carriers were less likely than controls to be referred from a community setting, and had resided within the community for a shorter time before the current admission. The number of underlying conditions was comparable in the two groups, but those infected were more likely to have cancer than the controls. While community-acquired MRSA carriage is rare, exposure to a health care setting (particularly if repeated) within six months from the current admission, is a risk factor for MRSA carriage and introduction of the organism into an institution.
Insights
Community-acquired Methicillin-Resistant Staphylococcus aureus (MRSA) carriage is uncommon. However, prior exposure to healthcare settings, especially repeated visits within six months, significantly increases the risk of MRSA carriage and institutional introduction.
Area of Science:
- Infectious Diseases
- Epidemiology
- Clinical Microbiology
Background:
- Methicillin-Resistant Staphylococcus aureus (MRSA) poses a significant healthcare challenge.
- Understanding the epidemiology of community-acquired MRSA is crucial for infection control.
Purpose of the Study:
- To identify risk factors associated with MRSA carriage in patients admitted to a healthcare institution.
- To investigate the prevalence and characteristics of community-acquired MRSA.
Main Methods:
- Prospective screening of all admitted patients for MRSA carriage (colonization and infection).
- Comparison of risk factors between identified MRSA carriers (n=86) and controls (n=86).
Main Results:
- Eighty-six MRSA carriers were identified, with 85 being nasal carriers.
- Carriers had shorter community residence times and were less likely referred from community settings compared to controls.
- Patients with MRSA infection were more likely to have cancer than controls.
Conclusions:
- Community-acquired MRSA carriage is rare but linked to healthcare exposure.
- Repeated exposure to healthcare settings within six months is a key risk factor for MRSA carriage.
- Identifying carriers is vital for preventing institutional MRSA introduction.
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