为了解商州市学龄前集体儿童乙型肝炎病毒感染情况,进一步给儿童保健和传染病管理工作提供科学依据,1995年对该市13所幼儿园823名学龄前儿童进行了乙型肝炎表面抗原(HBsAg)测定.1 材料与方法采集静脉血,用反向被动血凝试验法进行测定.HBsAg诊断血球和稀释液均系上海生物制品研究所生产,效期内使用.2 结果与分析 To understand the situation of hepatitis B virus infection in preschool children in Shangzhou and to provide scientific basis for the management of child health and infectious diseases, 823 preschool children from 13 kindergartens in the city were tested for hepatitis B surface antigen HBsAg) .1 Materials and Methods Venous blood was collected and measured by reverse passive hemagglutination test.HBsAg diagnosis of blood cells and dilutions were produced by Shanghai Institute of Biological Products, the validity of use.2 results and analysis