甘肃省长江流域流行性乙型脑炎流行病学特征分析

Analysis on the epidemiological features of epidemic encephalitis b in yangtze river gansu province

目的分析甘肃省长江流域2005-2009年流行性乙型脑炎(乙脑)流行情况,为有效预防控制乙脑提供科学依据。方法采用描述流行病学现况分析方法,对2005-2009年甘肃省长江流域乙脑报告病例进行分析,采用ELISA法检测病人早期血清乙脑IgM抗体。结果 2005-2009年甘肃省长江流域共报告乙脑病例197例,死亡6例,年平均发病率为1.44/10万,病例主要集中在8月份,占全部病例的71.07%(140例)。其中2006年报告乙脑病例79例,发病率为2.90/10万。15岁以下的病例占全部病例数的66.50%(131例)。职业分布以学生最多占32.99%,其次是农民、散居儿童,分别占28.93%、26.40%。检测病人血清43份,乙脑IgM抗体阳性33份,阳性率76.74%。结论甘肃省长江流域地区乙脑发病率总体呈下降趋势,但发病率有所波动,长江流域地区乙脑的威胁仍然存在,应继续加强防控措施。

Objective To analysis the epidemic conditions of epidemic encephalitis B in Yangtze River from 2005 to 2009,and provide scientific basis for effectively preventing and controlling.Method Descriptive epidemiological approaches were used to analyze the reported cases of epidemic encephalitis B from 2005 to 2009 at the Yangtze River basin in Gansu province.IgM antibody in serum of patients in stage was test by ELISA.Results 197 patients were reported in the Yangtze River basin during 2005 to 2009.All of the cases,6 were dead,the average annual incidence was 1.44 / 10 million,cases were mainly concentrated in August,and accounting for 71.07%（140 cases）.79 cases of epidemic encephalitis B were reported during 2006,the incidence rate was 2.90/10 million.Cases were concentrated under the age of 15,accounting for 66.50%.According to the occupational distribution,the students accounted for 32.99%,followed by farmers 28.93%,scattered children 26.40%.Detection 43 samples,epidemic encephalitis B IgM antibody positive rate was 76.74%.Conclusions Overall,the incidence rate of epidemic encephalitis B has declining,but threat is still exist and prevention measures should be continue strengthen at Yangtze River region in Gansu Province.