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调查静脉药瘾者中TT病毒（TTV）的感染状况。方法：在TT病毒开放读码框（ORF）1保守区设计引物，建立巢式PCR，检测83例静脉药瘾者和105名献血员血清中TTVDNA。结果：83例静脉药瘾者中33例TTVDNA阳性，阳性中为40％，而献血员的阳性率为11％（P＜0．05）、结论：静脉药瘾者是TT病毒感染的高危人群，不洁注射是感染TT病毒的重要途径。
Investigate the prevalence of TT virus (TTV) among intravenous drug addicts. Methods: Primers were designed in the conservative region of open reading frame (ORF) 1 of TT virus to establish nested PCR to detect TTVDNA in serum of 83 intravenous drug addicts and 105 blood donors. Results: Of the 83 intravenous drug addicts, 33 were positive for TTVDNA, 40% were positive, and 11% were positive for blood donors (P <0.05). Conclusion: Intravenous drug addicts are at high risk of TT virus infection , Dirty injection is an important way of infection with the TT virus.