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目的分析甘肃省1990～2008年流行性乙型脑炎(乙脑)的地区分布特征,为控制乙脑提供依据。方法运用描述流行病学方法,利用甘肃省疾病预防控制中心(CDC)历年疫情资料汇编和法定传染病报告系统资料,分析1990～2008年甘肃省乙脑地区分布特征。结果 1990～2008年,兰州及以西的6个市无病例,天水、陇南、平凉3市,是甘肃省乙脑发病最高的市,近19年年均发病率>1/10万,在14个市州乙脑发病率排序中一直位居前3位,每年乙脑病例数占全省乙脑病例总数95%左右。结论甘肃省乙脑病例主要集中在东南部地区,兰州以西无乙脑病例报告,天水、陇南、平凉3市是甘肃省的主要疫区。
Objective To analyze the geographical distribution of Japanese encephalitis (JE) in Gansu Province from 1990 to 2008 and provide evidence for controlling JE. Methods Descriptive epidemiological methods were used to analyze the distribution characteristics of JE region in Gansu Province from 1990 to 2008 by using the compilation of epidemic data of Gansu CDC and reporting system of notifiable infectious diseases. Results From 1990 to 2008, there were no cases in 6 cities of Lanzhou and west of China. There were 3 cities of Tianshui, Longnan and Pingliang, the highest incidence of Japanese encephalitis in Gansu Province. The annual average incidence was> 1/10 in the past 19 years, The state ranked the top three in terms of the incidence of Japanese encephalitis. The number of Japanese encephalitis cases annually accounts for about 95% of the total number of Japanese encephalitis cases in the province. Conclusions The cases of Japanese encephalitis in Gansu Province are mainly concentrated in the southeast region. There are no cases of Japanese encephalitis in west of Lanzhou. The three major epidemic areas of Tianshui, Longnan and Pingliang are Gansu Province.