Emergence of Multidrug-Resistant, Community-Associated, Methicillin-Resistant Staphylococcus aureus Clone USA300 in Men Who Have Sex with Men

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Emergence of Multidrug-Resistant, Community-Associated, Methicillin-Resistant Staphylococcus aureus Clone USA300 in Men Who Have Sex with Men

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Figure. Annual incidence of Multidrug-Resistant USA300 and percentage of male same-sex couples, by San Francisco ZIP code.

The legend indicates the annual incidence of multidrug-resistant USA300 per 100 000 persons. The number within each ZIP code is the percentage of male same-sex couples, calculated by dividing the number of male same-sex unmarried-partner households by the number of coupled (married and unmarried) households for each ZIP code, based on 2000 U.S. Census (Summary File 3) data (33). The asterisk indicates the location of the San Francisco General Hospital HIV Clinic.

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Table 1. Distribution of Methicillin-Resistant Staphylococcus aureus Genotypes and Antimicrobial Resistance Profiles at the San Francisco General Hospital HIV Clinic

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Table 2. Risk Factors for Multidrug-Resistant USA300 Infections among Outpatients in San Francisco and Boston

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Table 3. Adjusted Relative Risk for Multidrug-Resistant USA300 Infections among Outpatients Treated at the San Francisco General Hospital HIV Clinic

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Appendix Table. Primers Used in Sequencing of Multiresistance Conjugative Plasmid pUSA03 ${webonly}$