Contact with blood rather than semen explains the sexual transmission of hepatitis C virus in HIV-positive gay men, German investigators suggested at the 12th European AIDS Conference in Cologne.
Fisting, group sex, and snorting drugs emerged as significant risk factors for sexual transmission of hepatitis C. Unprotected anal sex in the absence of these risk factors was not associated with transmission of the virus, and the investigators believe that their findings should lead to the refocusing of hepatitis C prevention campaigns for HIV-infected gay men which have largely stressed the risk factors of unprotected sex.
Since 2000 outbreaks of sexually transmitted hepatitis C have been reported amongst HIV-positive gay men in a number of large northern European cities including London, Amsterdam and Berlin. Unprotected anal sex and fisting were quickly identified as risk factors.
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