流行性出血热(EHF)是自然疫源性疾病.该病的发生发展与地理、自然环境及生物景观有着密切的联系.龙泉市自1974年在龙渊镇发现首例EHF病例,22年来辖区的大部分乡镇陆续发生了本病的流行,疫区范围不断扩大,流行强度逐年增高到 Epidemic haemorrhagic fever (EHF) is a natural foci of disease.The occurrence and development of the disease is closely related to the geographical, natural environment and biological landscape.Longquan City, the first case of EHF was found in Longyuan in 1974, 22 years Of the majority of towns and villages have been the prevalence of this disease, the epidemic area continues to expand, the intensity of the epidemic increased year by year