Abstract: Objective To investigate the epidemic situation of encephalitis B and vector mosquitoes, and to provide information for its prevention and control. Methods Collecting and analyze epidemic data. Using light trap, scooping larvae to investigate the density of mosquito. Results In 2006, 42 cases of encephalitis B had been diagnosed, 6 of them died. The density index of mosquito of the patient home and other different locations were 6.05 and 13.22 pieces per light per hour, respectively; Culex(Cx.) tritaeniorhychus were 71.44% and 76.01% respectively. At 26 investigated breeding fields surrounding, respectively the larva density index(LDI) was 12.04 individuals per scoop, while Culex pipiens pallens were 49.44%, Cx.tritaeniorhychus were 37.87% of the total number the larva positive rates of container and crock amassing rain were 54.31% and 30.22% respectively. Aedes albopictus were 66.67% and 49.66% respectively; Cx.tritaeniorhychus were 25.11% and 33.42% respectively; Cx.pipiens pallens were 8.22% and 13.62% respectively. Conclusion The main vector of encephalitis B, Cx.tritaeniorhychus is popular in Ningbo. More attention should be paid to accination and mosquito control in encephalitis B control in Ningbo.

摘要： 目的 掌握宁波市流行性乙型脑炎(乙脑)传播媒介和疫情发生情况,为防治提供科学依据。方法 收集、整理和分析乙脑疫情资料。灯诱和勺捕法调查蚊虫密度。结果 2006年宁波市确诊乙脑42例,死亡6例。患者家中及不同场所成蚊密度指数分别为6.05和13.22只/(灯.h);三带喙库蚊分别占71.44%和76.01%。调查蚊幼虫孳生地26处,蚊幼密度指数为12.04条/勺,其中淡色库蚊占49.44%;三带喙库蚊占37.87%。容器、雨水缸蚊幼阳性率分别为54.31%和30.22%,其中白纹伊蚊占66.67%和49.66%;三带喙库蚊占25.11%和33.42%;淡色库蚊占8.22%和13.62%。结论 宁波市普遍存在三带喙库蚊等乙脑传播媒介。要加强疫苗预防接种和灭蚊、防蚊工作。

关键词: 流行性乙型脑炎, 媒介, 三带喙库蚊