ABSTRACT
<p><b>OBJECTIVE</b>To study HIV, HBV and HCV infections in intravenous drug users.</p><p><b>METHODS</b>2025 blood samples from intravenous drug users were collected from Sichuan, Hunan, Guangxi and Xinjiang regions, and tested for anti-HIV, anti-HCV, HBsAg using enzyme-linked immuno-sobent assays (ELISAs).</p><p><b>RESULTS</b>The positive rates of anti-HIV,anti-HCV and HBsAg were14.7%-30.4%, 60.7%-85.5% and 6.6%-22.4% in the intravenous drug users, respectively. The co-infection rates of HIV/HBV, HIV/HCV, HCV/HBV and HIV/HCV/HBV were 0%-0.4%, 11.6%-27.2%, 2.3%-14.3% and 1.6%-4.8% respectively in this population.</p><p><b>CONCLUSION</b>The infection rates of HIV, HBV and HCV were higher in the intravenous drug users than that in general populations in the same regions, and HIV/HCV co-infection appeared most frequent in this population.</p>