关键词: 流行性乙型脑炎, 传播媒介, 蚊虫, 监测

Abstract: Objective To investigate the species,distribution,habitat,behavior of mosquitoes to conclude the possible mosquito vectors of epidemic encephalitis B in Dongming county,Shandong;To make a comparison among four ways of surveillance of mosquito vectors.Methods Apply four ways:human baited net trap,catching with a net,light trap and indoor resting collection methods to catch the mosquitoes at the four habitat:urban areas,rice field,livestock and poultry shed,and household,and the environmental factors were recorded at the same time.Results Total 5116 mosquitoes were collected from the four habitat by four ways and belonged to 5 genera 7 species.Culex tritaeniorhynchusandCulex pipiens pallens were dominant in this area,accounting for 79.1% and 17.8%,respectively.Cx.pipiens pallens was dominant in urban areas,accounting for 53.3% and Cx.tritaeniorhynchus was dominant at rural area,accounting for 91.2%.Comparison of mosquito amount of the four habitat:57.7% was in livestock and poultry shed,18.9% in rice field,13.4% in urban areas,and in the household was only 9.9%.Comparison of mosquito amount by four ways:57.5% by indoor resting collection method,29.0% by human baited net trap,8.2% by light trap,and 5.3% by catching with a net.The peak of activity of Cx.tritaeniorhynchus and Cx.pipiens pallens occurred in 1-1.5 hours after sunfall,the latter was later and was in 20 mins.Conclusion The main vector of epidemic encephalitis B was possibly Cx.tritaeniorhynchus in Dongming,Shandong.The recommendable methods on the investigation and surveillance of mosquitoes were indoor resting collection and human baited net trap.Catching with a net and light trap were assistant for collecting rnosquitoes.