关键词: 流行性乙型脑炎, 媒介, 三带喙库蚊

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.