en ويروس شناسي پزشکي Medical Virology پژوهشي Research <div style="text-align: justify;"><strong>Background: </strong>HIV infected persons are also at risk for Infection with other pathogens, like Hepatitis B virus (HBV) and Hepatitis C virus (HCV). One of the main steps in the planning of treatment and prevention is the study of the HIV positive population who have HBV and/or HCV infection<strong>.</strong><br> The objective of this study was to determine the prevalence of HIV and Hepatitis B and C dual infection in north of Iran<br> <strong>Materials and methods: </strong>Blood samples were collected into EDTA containing tubes by sterile syringes and needles from 83 HIV positive patients which were previously confirmed by Real-time Polymerase chain reaction in the HIV center of the north of IRAN. A structured questionnaire was used to obtain socio-demographic data from participants. Samples were screened for Hepatitis B surface antigen (HBsAg) and anti-HCV antibody. All non-reactive samples were recorded as negative.<br> <strong>Results: </strong>Out of the 83 patients, 50(60%) were male and 33 (40%) were female. Positive hepatitis C antibody was found in 28 (33%) and positive hepatitis B surface antigen was present in 15 (18%) of patients. The frequency of all these three viruses co-infection was 7 (8%).<br> <strong>Conclusion: </strong>Seroprevalence of HCV and HIV co-infection was high and it was strongly related to mutual ways of acquisition.</div> HIV infections, Hepatitis B and C, Co-infection, AIDS 61 68 http://rmm.mazums.ac.ir/browse.php?a_code=A-10-26-36&slc_lang=en&sid=1 Mehrnaz Bakhti Mehrnaz Bakhti mehrnazbakhti@gmail.com 10031947532846007456 10031947532846007456 No Student research committee, faculty of Medicine, Sari, Mazandaran, Iran Student research committee, faculty of Medicine, Sari, Mazandaran, Iran Mohammadreza Haghshenas haghshenas2001@yahoo.com 10031947532846007457 10031947532846007457 Yes Department of microbiology and immunology, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Mazandaran, Iran Department of microbiology and immunology, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Mazandaran, Iran Reza Valadan valadan.reza@gmail.com 10031947532846007458 10031947532846007458 No Molecular and Cell Biology Research center, Department of Immunology, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Mazandaran, Iran Molecular and Cell Biology Research center, Department of Immunology, Faculty of Medicine, Mazandaran University of Medical Sciences, Sari, Mazandaran, Iran Mehdi Rabie Rudsari valadan_reza@yahoo.com 10031947532846007459 10031947532846007459 No HIV lab, Mazandaran University of Medical Sciences, Sari, Mazandaran, Iran HIV lab, Mazandaran University of Medical Sciences, Sari, Mazandaran, Iran