Journal Article

Community-Acquired Methicillin-Resistant <i>Staphylococcus aureus:</i> A Meta-Analysis of Prevalence and Risk Factors

Cassandra D. Salgado, Barry M. Farr and David P. Calfee

in Clinical Infectious Diseases

Published on behalf of Infectious Diseases Society of America

Volume 36, issue 2, pages 131-139
Published in print January 2003 | ISSN: 1058-4838
Published online January 2003 | e-ISSN: 1537-6591 | DOI: http://dx.doi.org/10.1086/345436
Community-Acquired Methicillin-Resistant Staphylococcus aureus: A Meta-Analysis of Prevalence and Risk Factors

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Reports suggest that carriage of methicillin-resistant Staphylococcus aureus (MRSA) among persons without health care—associated risks has increased. A meta-analysis of studies reporting the prevalence of community-acquired MRSA (CA-MRSA) among MRSA isolates from hospitalized patients or the prevalence of MRSA colonization among community members was conducted. The CA-MRSA prevalence among hospital MRSA was 30.2% in 27 retrospective studies and 37.3% in 5 prospective studies; 85% of all patients with CA-MRSA had ⩾1 health care—associated risk. The pooled MRSA colonization rate among community members was 1.3% (95% confidence interval [CI], 1.04%–1.53%), but there was significant heterogeneity among study populations. Community members from whom samples were obtained in health care facilities were more likely to be carrying MRSA than were community members from whom samples were obtained outside of the health care setting (relative risk, 2.35; 95% CI, 1.56–3.53). Among studies that excluded persons with health care contacts, the MRSA prevalence was 0.2%. Moreover, most persons with CA-MRSA had ⩾1 health care—associated risk, which suggests that the prevalence of MRSA among persons without risks remains low (⩽0.24%). Effective control of dissemination of MRSA throughout the community likely will require effective control of nosocomial MRSA transmission.

Journal Article.  5508 words.  Illustrated.

Subjects: Infectious Diseases ; Immunology ; Public Health and Epidemiology ; Microbiology

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