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目的 以 Ｈ Ｂ Ｖ· Ｄ Ｎ Ａ 作为 Ｈ Ｂ Ｖ感染的流行病学调查指标。方法 应用 Ｐ Ｃ Ｒ技术对１０ ９７６ 例肝病患者血清中的 Ｈ Ｂ Ｖ· Ｄ Ｎ Ａ 进行检测，并与其它乙肝病毒标志物（ Ｈ Ｂ Ｖ Ｍ）尤其是 Ｈ Ｂｅ Ａｇ 进行对比分析。结果 Ｈ Ｂ Ｖ· Ｄ Ｎ Ａ 阳性率（４１．８％ ）明显高于 Ｈ Ｂｅ Ａｇ 阳性率（２２．５％ ）。从 Ｈ Ｂ Ｖ· Ｄ Ｎ Ａ 检出率的性别与年龄分布来看，男性组（４５．４％ ）明显高于女性组（２９８％ ），６０ 岁以上年龄组和２０ 岁以下年龄组阳性率较低（３３５％ 、３７４％ ），其它几个年龄组较高且较接近（４１７％ 、４３０％ 、４４０％ 、４２４％ ）（ Ｐ＞ ０．０５）。不同类型肝病患者血清 Ｈ Ｂ Ｖ· Ｄ Ｎ Ａ 的检测为：肝硬化组 Ｈ Ｂ Ｖ· Ｄ Ｎ Ａ 阳性率最高（６４．５％ ），慢性肝炎组次之（５７．１％ ），急性肝炎组最低（２５．６％ ）。结论 以 Ｐ Ｃ Ｒ技术检测 Ｈ Ｂ Ｖ· Ｄ Ｎ Ａ 明显较其它乙肝病毒标志物敏感，它可进一步揭示 Ｈ Ｂ Ｖ 的传染源和传播途径，也更有利于临床对乙肝的诊断和治疗。
OBJECTIVE: To determine the prevalence of H B V infection by using H B V · D N A as an epidemiological index. Methods The serum HBV DNA levels of 10 976 liver disease patients were detected by P C R technique and compared with other hepatitis B virus markers (H B V M), especially H Be Ag. Results The positive rate of H B V · D N A (41.8%) was significantly higher than that of H Be Ag (22.5%). From the gender and age distribution of H B V · D N A detection rate, the male group (45.4%) was significantly higher than the female group (298%), the age group over 60 years and the age group below 20 years old The positive rates were lower (335%, 374%) than those in other age groups (417%, 430%, 440%, 424%) (P> 0.05). The detection of H B V · D N A in patients with different types of liver diseases was as follows: the highest positive rate of H B V · D N A in cirrhosis (64.5%), the second (57.1%) in chronic hepatitis, acute hepatitis The lowest group (25.6%). Conclusion The detection of HBV DNA by P C R is obviously more sensitive than other hepatitis B virus markers. It can further reveal the source of infection and transmission of H B V, and is more conducive to the clinical diagnosis and treatment of.