本文研究了61只家鸭血清中乙型肝炎病毒和肝病间的关系。61只家鸭中24只来源于中国启东县;20只来源于中国长春市;17只来源于日本千叶地区。通过电子显微镜检查、内源性DNA多聚酶活性测定和鸭乙型肝炎病毒DNA杂交试验,37只长春和千叶地区的家鸭乙型肝炎病毒全部阴性,亦未见肝脏病变,而启东24只家鸭中12只(50％)血清中存在病毒样颗粒,大多数启东鸭的肝脏可见到包括慢性肝炎和肝硬变的各种肝脏病理改变。其中鸭乙型肝 In this paper, 61 domestic duck serum hepatitis B virus and liver disease. Twenty-four of the 61 domestic ducks originated from Qidong County, China; 20 from Changchun City, China; 17 from Chiba Prefecture, Japan. By electron microscopy, endogenous DNA polymerase activity assay and duck hepatitis B virus DNA hybridization test, 37 domesticated duck hepatitis B virus in Changchun and Chiba Prefecture were all negative, and no liver disease was found, whereas in Qidong 24 Twelve of the ducks (50%) had virus-like particles in their sera, and most of the Qindong duck’s liver showed various liver pathological changes including chronic hepatitis and cirrhosis. Among them duck b liver