Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) is a human pathogen that has diverse molecular heterogeneity. Most MRSA strains in the United States are pulsed-field gel electrophoresis USA100 sequence type (ST) 5 and USA300 ST8. Infections with MRSA ST239-III are common and found during health care-associated outbreaks. However, this strain has been rarely reported in the United States. As part of a study supported by the Prevention Epicenter Program of the Centers for Disease Control and Prevention (Atlanta, GA, USA), which evaluated transmission of MRSA among hospitals in Ohio, molecular typing identified 78 (6%) of 1,286 patients with MRSA ST239-III infections. Ninety-five percent (74/78) of these infections were health care associated, and 65% (51/78) of patients had histories of invasive device use. The crude case-fatality rate was 22% (17/78). Identification of these strains, which belong to a virulent clonal group, emphasizes the need for molecular surveillance.
Highlights
This activity has been planned and implemented in accordance with the Essential Areas and policies of the Accreditation Council for Continuing Medical Education through the joint sponsorship of Medscape, LLC and Emerging Infectious Diseases
We describe clinical epidemiologic characteristics and molecular analysis of clinical infections with methicillin-resistant Staphylococcus aureus (MRSA) ST239-III in the midwestern United States
All MRSA specimens from community hospitals and selected Ohio State University (OSU) MRSA blood isolates and isolates from patients residing in the catchment areas of the outreach hospitals were prospectively collected during March 2009–February 2010 for genotyping by using a repetitive element PCR
Summary
This activity has been planned and implemented in accordance with the Essential Areas and policies of the Accreditation Council for Continuing Medical Education through the joint sponsorship of Medscape, LLC and Emerging Infectious Diseases. LLC is accredited by the ACCME to provide continuing medical education for physicians. All other clinicians completing this activity will be issued a certificate of participation To participate in this journal CME activity: [1] review the learning objectives and author disclosures; [2] study the education content; [3] take the post-test with a 70% minimum passing score and complete the evaluation at www.medscape.org/journal/eid; [4] view/print certificate. MS, has disclosed no relevant financial relationships. MD, has disclosed no relevant financial relationships
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