* Incidence of the new variant is 13 times higher in [[San Francisco]]'s heavily [[gay]] Castro neighborhood and surrounding zip codes than in the city's general population. That concentration — and the fact that many infections appear on the buttocks and the genital region — is leading researchers to suggest that MDR staph is being spread through sexual contact. | * Incidence of the new variant is 13 times higher in [[San Francisco]]'s heavily [[gay]] Castro neighborhood and surrounding zip codes than in the city's general population. That concentration — and the fact that many infections appear on the buttocks and the genital region — is leading researchers to suggest that MDR staph is being spread through sexual contact. |