目的　研究乙型肝炎病毒 (HBV)感染者重叠感染输血传播病毒 (TTV)的状况。方法　采用斑点杂交法检测乙型肝炎病毒感染者血清TTVDNA。结果　在 16 9例乙型肝炎病毒感染者中检出血清TTVDNA阳性者 2 3例 ,阳性率 13 6 1%。其中 ,急性乙型肝炎患者组阳性率 13 46 % ,慢性乙型肝炎患者组阳性率 15 0 7% ,HBsAg携带者组阳性率 11 36 % ,三者之间的差异无统计学意义P >0 0 5。结论　在我国存在TTV感染 ,但其致病性值得进一步探讨 Objective To study the status of transfusion transmitted virus (TTV) in patients with Hepatitis B virus (HBV) infection. Methods Dot blot hybridization was used to detect serum TTVDNA in patients with hepatitis B virus infection. Results Serum TTV DNA was detected in 23 of 16 hepatitis B virus-infected patients, with a positive rate of 13 6 1%. Among them, the positive rate was 13 46% in patients with acute hepatitis B, 15 0 7% in patients with chronic hepatitis B, and 11 36% in HBsAg carriers. There was no significant difference among the three 0 5. Conclusion TTV infection exists in our country, but its pathogenicity deserves further exploration