对 1 998年我省沿江地区洪涝灾害期间出血热疫区 ,通过流行病学、血清学调查 ,论证沿江地区洪涝灾害期间局部地区EHF的疫源地强度有所增加 ,望江县泊湖乡的EHF传染源带毒鼠指数为 0 .1 7;健康人群EHF隐性感染率灾后较灾前明显升高。针对沿江灾后EHF疫源地强度的不同 ,及时采取了综合性防治措施 ,有效地控制了EHF的发生和流行。确保大灾之后无大疫 The epidemic and serological investigation of hemorrhagic fever in flood-affected areas along the Yangtze River in Liaoning Province in 1998 showed that the intensity of the endemic areas of EHF in some areas during the flood disaster in the Yangtze River increased. The index of EHF infection was 0.17; the latent infection rate of EHF in healthy population was significantly higher than that before the disaster. In response to the different intensity of EHF epidemic along the river, timely take comprehensive prevention and control measures to effectively control the occurrence and prevalence of EHF. After the disaster to ensure that no major epidemic