采用ＥＩＡ法对１１３名静脉吸毒者、８名口吸者、１０１名性罪错者及已婚自然人群２４５人进行ＨＣＶ感染及相关因素调查。结果发现四组人群抗－ＨＣＶ阳性率分别为９２．０４％、３７．５０％、３．９６％、２．４５％，静脉吸毒者抗－ＨＣＶ阳性率分别与其它三组之间差异非常显著。静脉吸毒者、口吸者及性罪错者ＨＣＶ感染分别与自然人群ＨＣＶ感染的比值比为４６０．３０、２３．９０、１．６４。性罪错者抗－ＨＣＶ阳性率与自然人群统计上无明显差异。表明吸毒者中ＨＣＶ呈高度流行，性罪错者感染率较低。造成吸毒者中ＨＣＶ流行同合用注射器、吸毒方式有关。 The EIA method was used to investigate HCV infection and related factors in 113 intravenous drug users, 8 mouth-sucking, 101 sex offenders and 245 married natural persons. The positive rates of anti-HCV in the four groups were 92.04%, 37.50%, 3.96% and 2.45%, respectively. The positive rates of anti-HCV in intravenous drug users were significantly different from those in the other three groups . The ratio of HCV infection to intravenous drug users, oral inhalers and sex offenders were respectively 460.30, 23.90 and 1.64 with HCV infection in the natural population. There was no significant difference in anti-HCV positive rate between the sex offenders and the natural population. This indicates that HCV is highly prevalent in drug abusers, with relatively low rates of sexual misconduct. Caused drug users in the prevalence of HCV syndrom with syringes, drug use.