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Updated: Jun 25, 2026
12:18
Subcutaneous Infection of Methicillin Resistant Staphylococcus Aureus (MRSA)
Published on: February 9, 2011
Duration of colonization with methicillin-resistant Staphylococcus aureus
Ari Robicsek1, Jennifer L Beaumont, Lance R Peterson
1Department of Medicine, Northwestern University's Feinberg School of Medicine, Evanston, Illinois 60201, USA. arobicsek@enh.org
Summary
Methicillin-resistant Staphylococcus aureus (MRSA) colonization duration is unclear. Studies show nearly half of patients remain colonized one year after initial detection, with over 20% still colonized at four years.
Area of Science:
- Infectious Diseases
- Clinical Microbiology
Background:
- Methicillin-resistant Staphylococcus aureus (MRSA) poses a significant public health threat.
- The persistence of MRSA colonization in patients is not well understood, impacting infection control strategies.
Purpose of the Study:
- To define the duration of methicillin-resistant Staphylococcus aureus (MRSA) colonization in patients following a positive culture.
- To provide data for improved infection control and patient management guidelines.
Main Methods:
- Retrospective analysis of 1564 patient admissions with positive MRSA cultures or surveillance tests.
- Regular retesting of patients to determine the persistence of MRSA colonization over time.
Main Results:
- Within the first year post-positive culture, 48.8% of patients remained colonized with MRSA.
- At four years after the initial positive result, 21.2% of patients continued to be colonized with MRSA.
Conclusions:
- MRSA colonization can be persistent, lasting for several years in a significant proportion of patients.
- These findings highlight the need for long-term surveillance and decolonization strategies for MRSA carriers.
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