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Hepatitis C virus (HCV) infection is common among HIV-infected individuals, especially injection-drug users (IDUs) and hemophiliacs. However, during the past few years, HIV-infected men who have sex with men (MSM) have also been identified as a high-risk group for HCV infection (JW AIDS Clin Care Aug 8 2011). To assess changes in the incidence of HCV infection among these various risk groups, investigators looked at 13 years' worth of data (1998–2011) from the Swiss HIV Cohort Study. Study participants were screened for HCV infection at entry into the cohort and every 2 years thereafter.
At study enrollment, 3% of MSM, 92% of IDUs, and 11% of heterosexuals were already HCV positive. Of the 8709 study participants who were HCV negative at bas…