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8th International Workshop on HIV Transmission Principles of Intervention,Barcelona, Spain/Poster presentation

Prevalence of HIV and other viral infections among Female Sex Workers in Tehran, Iran. By using Respondent-Driven Sampling

S. Moayedi Nia, Z. Bayat Jozani, Gh. Esmaeeli Djavid , F. Entekhabi , S. Bayanolhagh , M. Saatian, A. Sedaghat, M. Mohraz

Iranian Research Center for HIV/AIDS, Iranian Institute for Reduction of High-Risk Behaviors , Tehran University of  Medical Sciences,2.Dept. of Pathology, Islamic Azad University Tehran Medical Branch, Center for Disease Control (CDC) of Iran, 3.Ministry of Health and Medical Education, Tehran, Iran

Introduction: To find out the prevalence of HIV, HCV, HBV and HSV2 infections among Female Sex Workers (FSWs) in Tehran, A cross-sectional study by using Respondent-Driven sampling (RDS) method was conducted.

Method: From December 2011 to April 2012 Female sex workers in Tehran were included in this study by using RDS method. Inclusion criteria consisted of having experience of at least one time selling sex during the last 12 months and selling sex for at least six months in participants’ lifetime. Participants were interviewed based on the structured questionnaire (demographic information, sexual behaviors, drug history, HIV testing history, STIs symptoms and knowledge of HIV transmission). Following it, Blood sample were collected by using Dried Blood Sampling (DBS) method for purpose of detect HIV, hepatitis C, Hepatitis B , herpes simplex virus infection and syphilis. Logistic regression analysis has been used to identify factors associated with HIV infection.

Results: Among 161 Consenting participants, 5% (8) were infected with HIV. Moreover, 8.1% (13) of FSWs were HCV positive, 37.9% (61) were HSV type1, 2 positive and 1.2% (2) of participants were infected to HBV Ag. No case of syphilis was found among participants. Regarding important HIV risk behaviors, FSWs Reported using condom with their last client was 67.3 % while only 49.5 percent reported using condom in the last sex with their non-paying partners.  Of participants, 25.5% have been experienced sexual abuse during last month. In addition, 55.9 % (90) have reported having symptoms of STIs during last 12 months. 25.5% (41) of participants reported using injected drug during their lifetime. Only 20.5% had enough knowledge about HIV transmission routes. 32.7 %( 53) of female sex workers reported being tested for HIV during last 12 months and knew the results of the test. Compared to non-infected FSWs, HIV infected FSWs were significantly more likely to test positive for HSV type1 and 2(75% vs 35.9%) , to be older(>25 years of age) , have more than six clients per week and have history of STIs in last 12 months (100% vs  59.2%). In multiple Logistic regression analysis, being tested positive for HSV type1 and 2 and to be older (>25 years of age) were found to be independently associated with HIV infection.

Conclusion: Comparing with the general population of Tehran, Relatively high prevalence of HIV and other viral infections among FSWs should be considered. All in all, it is critical to commence effective counter-measures for this high risk group if the aim is to prevent spreading of these viruses to general population.

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