采用血清流行病学方法和行为问卷对 3市县戒毒所5 1 4名吸毒人员进行调查。结果 :单纯口吸者占 6 6 1 5 % ,静脉注射吸毒者占 33 85 % ,共用注射器占静脉吸毒者 2 4 71 % ,检出抗HIV、抗HCV、HBsAg和梅毒阳性率分别为 0 1 95 %、2 9 6 7%、2 2 85 %、7 0 3%。表明 :吸毒者是 4种传染病感染的高危人群 ,静脉 (共用针具 )吸毒方式对HIV、HCV感染较HBV、梅毒感染影响更大 Serological epidemiological methods and behavioral questionnaires were used to investigate 5 1 4 drug addicts in 3 drug treatment centers in 3 counties. Results: The rate of anti-HIV, anti-HCV, HBsAg and syphilis were 6 61.5% for intravenous drug users, 33 85% for intravenous drug users and 24 71% for intravenous drug users, respectively 95%, 2 9 6 7%, 2 2 85%, 70 3%. The results showed that drug addicts were the high risk groups infected by 4 kinds of infectious diseases. The intravenous (shared needles) drug use had a greater impact on HIV and HCV infection than that of HBV and syphilis