云南景洪市蚊虫季节消长与乙型脑炎流行关系研究

为掌握云南景洪市蚊虫季节消长特点及其与乙型脑炎流行的关系,为该疾病防控提供有效依据,2007年10月至2008年9月本研究在云南景洪市普文镇畜圈和人房每月采用诱蚊灯方法通宵捕蚊,对采获的蚊虫使用白纹伊蚊C6/36细胞培养法分离乙脑病毒,并对分离到的病毒进行分子生物学鉴定.收集2007～2008年景洪市乙脑疫情资料进行乙...

Relationship between the seasonal fluctuation of mosquito populations and the epidemic of Japanese encephalitis in Jinghong County, Yunnan Provence

To investigate the relationship between the seasonal fluctuation of mosquito populations and the epidemic of Japanese encephalitis （JE） in Jinghong County of Yunnan province, and provide an effective basis for JE control, a field investigation was conducted from 2007 to 2008 on the seasonal fluctuation of mosquitoes. Viruses were isolated from collected mosquitoes and identified, and the data of JE cases were simuhaneously collected and analyzed. A total of 17 908 mosquitoes belonging to 4 Genera and 18 species were collected with Culex tritaeniorhynchus and Anopheles sinensis as the dominant species in livestock shelters and human houses. The seasonal distribution of JE cases closely coincided with the seasonal fluctuation of Cx. tritaeniorhynchus. A strain of genotype 1 JEV was isolated from Cx. tritaeniorhynchus collected before the seasonal peak of JE incidence and four strains from Cx. tritaeniorhynchus and Anopheles sinensis collected after the seasonal peak of JE prevalence. The result showed that Cx. tritaeniorhynchus was the main species of JEV vector, and the local pathogen of JE was probably genotype 1 JEV. Vector surveillance in JE incidental areas for monitoring vector population should be build up for timely implementation of intervention methods. Vector mosquito control and JEV vaccination should be initiated and enhanced before JE prevalence.