关键词: 肾综合征出血热, 疫情, 调查

Abstract: This article analysed the data of the occurrence of HFRS in Gansu Province and the data of investigations made by two surveillance units from 1983 to 1993.Since the cases of HFRS were found in Tianshui District and Longnan District in 1983, the epidemic areas gradually expanded to Pingliang and Dingxi districts and Gansu Zang Autonomous Region. up to 1993,1514 cases were reported in the whole province,and 91 cases died.A total of 18 counties reported local cases. In 1980s, the disease was relatively stable. The morbidity wbs 0.02-0.05/100000.In 199Os,the morbidity rose to 0.09-4.55/1000O0.The epidemic areas concentrated in the yellow soil plateau and mountain. New epidemic areas were high morbidity areas and medium morbidity areas.Serotyping of patients showed that Apodemus－type epidemic areas were predominant(86%).Rattus-type HFRS case was not found.However, cases were present in the whole year, especially in counties of Pingliang District.The main source of infection were Apodemus agrarius, Mus musculus,Rattus norvegicus and Cricetulus triton.The severe epidemic area,Mian County,is a high,frigid. gloomy and damp mou-ntainous area，2500─3000m above the sea level,had outbreaks of HFRS in two successive years（1992,1993）.This situation did not conform in height above sea level with the natural geographic characteristics of the distribution of HFRS epidemic areas in China.Basing on the investigation from September to November,1993.the corstitutional percentages of Apodemus agrarius in fields and inside houses were 93.42% and 57.78%,respectively,which were rather rare in China.