title: Hepatitis C and HIV in injecting drug users in Armenia, Colombia.
abstract: A constant and progressive increase in the availability of heroin in Colombia in recent decades and the intravenous use  of this drug have established the need to prevent a possible epidemic of HIV and hepatitis C. This research determined the sero-prevalence of hepatitis C and HIV according to sociodemographic characteristics and risk behaviors in people who inject drugs in Armenia, Colombia. This is a cross-sectional study on 265 users captured through respondent-driven sampling after informed consent. Sero-prevalence of hepatitis C was 22.3 % [95% CI 12.3 % -23.5 %]; for HIV infection, it was 2.6 % [95% CI 0.4 to 6.0]; 67.5% reported injecting for more than two years, 35 % shared needles and syringes, and 12.4 % had used a condom during their last sexual intercourse. Users who did not purchase syringes in drugstores in the last six months are 2.7 times [95% CI 1.32 to 5.48] more likely to contract hepatitis C; daily injection frequency was higher in HIV- positive cases [OR 2.87; 95% CI 0.55 to 15.9] but nonsignificant. One fourth of respondents are infected with HIV or hepatitis C, either as a single infection or co-infection. This study identified risk practices such as sharing needles and low condom use in the last six months, worldwide documented and discussed risk factors. This research is a first step in the search for strategies to prevent the spread of HIV infection and hepatitis C in networks of injecting drug users.
authors.affiliation: Universidad CES. dberbesi@ces.edu.co.
authors.forename: Dedsy
authors.initials: D
authors.lastname: Berbesi-Fernández
authors.forename: Ángela
authors.initials: Á
authors.lastname: Segura-Cardona
authors.forename: Liliana
authors.initials: L
authors.lastname: Montoya-Vélez
authors.forename: Guillermo A
authors.initials: GA
authors.lastname: Castaño-Perez
mesh_terms: D003105:Colombia / Q000453:epidemiology; D003430:Cross-Sectional Studies; D055030:Drug Users; D015658:HIV Infections / Q000453:epidemiology*; D006526:Hepatitis C / Q000453:epidemiology; D006801:Humans; D016485:Needle Sharing / Q000009:adverse effects*; D012307:Risk Factors; D012309:Risk-Taking; D015819:Substance Abuse, Intravenous / Q000453:epidemiology