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Springerplus. 2013 Dec;2(1):133. doi: 10.1186/2193-1801-2-133. Epub 2013 Mar 26.

Community-associated methicillin-resistant staphylococcus aureus epidemic clone USA100; more than a nosocomial pathogen.

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Department of Environmental and Occupational Health, University of South Florida, College of Public Health, Tampa, FL 33612 USA.



We characterized 100 USA100 epidemic MRSA from individuals in the community with no known healthcare-associated risk factors.


Molecular epidemiology demonstrated 21 pulsed-field types and six spa types. SCCmec typing demonstrated that all of the strains possess the type II cassette. The staphylococcal enterotoxin D virulence gene was also present.


Characterization of USA100 MRSA in the community illustrated the importance of nasal carriage, and the genetic diversity of the USA100 clone.


MRSA; PFGE; Spa; Staphylococcus; USA100

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