为进一步搞清佳木斯市EHF不同流行强度疫区自然人群隐性感染情况,为掌握EHF的流行病学动态,制定切实的防治措施,我们于1989—03～11两次对宝清、富锦、汤原、桦南、抚远五县以随机方法对上述五县的自然人群进行了血清IgG抗体测定,现将结果报告如下。 1 材料与方法:其对象主要是从事农业生产的农民及农场职工,年龄15岁以上,既往无 In order to further understand the latent infection of natural population in EHF epidemic areas with different epidemic intensities in Jiamusi City, in order to master the epidemiological dynamics of EHF and formulate effective prevention and control measures, we conducted two surveys on Baoqing, Fujin, Tangyuan, Huanan, Fuyuan five counties randomized to the five counties of the natural population of serum IgG antibody, the results are reported as follows. 1 Materials and Methods: The main targets are farmers and farm workers engaged in agricultural production, aged 15 and above, without previous