2005年流行性乙型脑炎疫情分析

Epidemic situation analysis of Japanese encephalitis in 2005

目的了解2005年我国贵州、四川和湖北省三个监测点的乙脑流行情况。方法收集三个监测点的乙脑流行状况、媒介蚊虫、宿主带毒水平。结果2005年我国贵州、四川和湖北3个省的乙脑报告病例数占全国总数的40．7％，其中贵州和四川省的病例数居全国前2位，发病率均超过1／10万，高于全国平均水平；报道病例中0～10岁儿童占报告病例90％以上；病例以散居儿童为主；乙脑病例主要集中于6-9月，而7～8月发病数最多；蚊虫密度调查显示库蚊和三带喙库蚊为主要蚊种。结论三省监测点与全国乙脑流行规律相同。贵州和四川省乙脑病例居全国前2位。

Objective To investigate the epidemic situation of Japanese encephalitis （JE） in three provinces, Guizhou, Sichuan, and Hubei in 2005. Methods Information about epidemic situation of JE, mosquitoes specimens were collected and titers of JE virus in hosts in the above three surveillance sites were determined. Results The reported cases of JE in Guizhou, Sichuan, and Hubei province accounted for 40.7 % of total cases in 2005 in China. The numbers of cases in Guizhou and Sichuan ranked at the first two in China, morbidity exceeded 1/10 0000,which was higher than average level in China. Zero to 10 years old children accounted for 90% in reported cases. Most of the cases were children lived at home. Almost all JE cases were presented from June to September, but most cases were reported between July and August. Investigaton of the density of vector showed that the dominant mosquitoes were Culex, especially the Culex tritaeniorhynchus. Conclusion The epidemic status of JE was similar among the three provinces and the whole country. The number of JEV cases in Guizhou and Sichuan were the highest in China.