Objective: To characterize the overlap between injection drug use and sex work by women in Tijuana and Cd. Juarez, situated on the Mexico-U.S. border.
Methods:FSWs aged ≥18 years who were not knowingly HIV-positive and reported having unprotected sex with ≥1 client in the prior two months underwent interviews and testing for HIV, syphilis gonorrhea and Chlamydia. Logistic regression identified factors associated with injecting drugs within the last month.Results: Of 924 FSWs, 18.0% had ever injected drugs. Among FSW-IDUs (N=114), prevalence of HIV, syphilis titers >1:8, gonorrhea and Chlamydia was significantly higher at 12.3%, 22.7%, 15.2% and 21.2% compared to 4.8%, 13.1%, 5.2% and 11.9% among other FSWs (N=810). FSWIDUs also had more clients in the past six months (median: 300 vs. 240, p=0.02). Factors independently associated with injecting drugs in the past month included living in Tijuana, being younger, being married/common-law, longer duration in the sex trade, speaking English, earning Corresponding Author and Reprint Requests: Thomas L. Patterson, PhD Department of Psychiatry (0680) University of California, San Diego 9500 Gilman Drive La Jolla, CA 92093-0680 Phone: 858-534-3354; Fax: 858-534-7723 E-mail: tpatterson@ucsd.edu. Contributors Drs. Patterson and Semple designed the behavioral intervention study (NIMH R01 MH065849), supervised data collection, and contributed to manuscript writing. Dr. Strathdee planned the analysis, assisted with interpreting results, and wrote the majority of the manuscript. Ms. Philbin and Ms. Pu conducted the analyses and assisted with interpreting results and writing the manuscript. Drs. de la Torre, Amaro, Magis, Salazar assisted with study design and interpreting results and revising the manuscript. Drs. Lozada, Staines, Martinez and Fraga supervised data collection and assisted with the manuscript. Ms. Orozovich supervised data collection and provided oversight of the intervention study. All authors contributed to and have approved the final manuscript.
Conflict of InterestThe authors have no conflicts of interest to disclose.Publisher's Disclaimer: This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final citable form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Conclusions: FSW-IDUs had higher STI levels, engaged in riskier behaviors and were more vulnerable to having unsafe sex with clients compared to other FSWs, indicating that this subgroup is an important bridge population requiring focused prevention.
NIH Public Access