西安市流行性乙型脑炎流行病学特征分析

利用传染病报告系统报告数据和生物媒介监测,分析西安市流行性乙型脑炎(乙脑)的流行情况、宿主仔猪病毒感染率和生物媒介蚊子密度。西安市乙脑1951—1984年期间发病率为8.80/10万,1984年计划免疫实施后发病率开始呈大幅度下降趋势,80年代平均3.78/10万,90年代平均2.62/10万,2001—2007年期间发病率平均0.39/10万,呈明显阶段下降趋势。生物媒介显示西安蚊虫以淡色库蚊为主,仔猪乙脑病毒感染率较低。防止乙脑应采取提高接种率、灭蚊和加强乙脑疾病监测系统的综合性预防措施。

Epidemic characteristics analysis on Japanese B encephalitis in Xi'an

Objective To analyze the epidemic situation of Japanese B encephalitis(JE) in Xi'an,survey the virus infection of parasitifer,the newborn pigs,examine the density of biology medium of mosquito by using the data from infectious reporting system and surveillance of biology medium.The JE incidence appeared 8.80/100000 from 1951 to 1984 in Xi'an.After implementation of Expanded Immunity Program from 1984,the incidence began to largely drop with the average incidence 3.78/100000 in 1980's and 2.62/100000 in 1990's.The average incidence from 2001 to 2007 is 0.39/100000 with the sharp downtrend.Analysis of biology medium showed that the main mosquito in Xi'an is the light culex and the virus infectious rate of newborn pigs is relatively low.The general prevention measures mainly by improving vaccination rate on JE,killing mosquito,and enhancing the surveillance system on JE should be adopted.