不同血源对流行性乙型脑炎媒介室内空间分布的影响

目的研究流行性乙型脑炎（乙脑）媒介三带喙库蚊和致倦库蚊室内空间分布与血源的关系。方法利用人诱法，调查蚊虫的密度。结果在靠近动物（梅花鹿）血源的餐厅区房间，三带喙库蚊占74．80％，致倦库蚊占21．14％（n=472）；在以人血源为主的人居房间，致倦库蚊占60．28％，三带喙库蚊占36．62％（n=815）。三带喙库蚊的密度餐厅区房间高于人居房间（df=1，χ^2=5．32，P〈O．05，n=676）；致倦库蚊的密度也是餐厅区房间高于人居房间（df=1，χ^2=268．45，P〈0.001，n=611）。结论血缘的空间分布影响乙脑媒介在室内的空间分布。三带喙库蚊室内空间分布靠近动物血源；而致倦库蚊室内空间主要受人类血源分布的影响。

Influence of the blood sources on indoor spatial distribution of Japanese encephalitis vectors LIU Wen-hua, CAI Song-wu,

Objective A field study was carried out in a restaurant in the south of China to investigate the blood sources affected Japanese encephalitis （JE） vectors Culex tritaeniorhynchus and Cx.pipiens quinquefasciatus indoor abundance. Methods Vector density was investigated by human-leg capture technique. Results In the dinning room adjacent to deer blood resource, Cx.tritaeniorhynchus was the dominant specie （74.80% of total number） and the minor vector was Cx.pipiens quinquefasciatus （21.14%）. However, in the restroom where the mosquitoes could only access to human blood, Cx.pipiens quinquefasciatus accounted for 60.28% and that of Cx.tritaeniorhynchus was 36.62% （n=845）. The density of Cx.tritaeniorhynchus in restroom was higher than that in the dinning room （df= 1, χ^2=5.32, P〈0.05, n=676）. However, the density of Cx.pipiens quinquefasciatus in the dinning room was higher than that in the restroom（df= 1, χ^2=268.45, P〈0.001, n=611 ）. Conclusion The results showed that the blood resources influenced the JE vector spatial abundance. The abundance of Cx.tritaeniorhynchus or Cx.pipiens quinquefasciatus was affected by the animal blood or the human blood.