宁波市2016年白纹伊蚊越冬孳生地调查及影响因素分析

Analysis of the breeding sources of overwintering Aedes albopictus and influencing factors in Ningbo city,2016

目的了解宁波市白纹伊蚊越冬情况,为蚊虫防治和虫媒传染病防控提供科学依据。方法 2016年2-3月,采集宁波地区11个县(市、区)5种生境、4种积水容器、不同水质积水和积泥的蚊幼虫,实验室孵化白纹伊蚊。结果共采集有效样品1528份,白纹伊蚊阳性率为23.36%。废旧轮胎、暂时性积水容器和植被性积水容器白纹伊蚊的阳性率均高于固定型积水容器,经Logistic回归分析,3种容器白纹伊蚊阳性率分别是固定型积水容器的2.623(95%CI:1.698~4.052)、1.968(95%CI:1.280~3.027)和1.759倍(95%CI:1.046~2.958)。山区和半岛白纹伊蚊阳性率高于平原,分别是平原的1.507(95%CI:1.034~2.197)和1.530倍(95%CI:1.015~2.306)。结论宁波市越冬白纹伊蚊阳性率处于较高水平,应积极做好对早春白纹伊蚊虫卵和幼虫的消杀工作,从而有效地控制全年蚊虫密度。

Objective To investigate hibernating Aedes albopictus in Ningbo city for local mosquito and diseases control. Methods The investigation was carried out from February to March in 2016. Collecting deposition including water and mud from 11 countries, 5 kinds of habitat, 4 kinds of containers and then were incubated in laboratory. Results A total of 1 528 valid samples were collected and the Ae. albopictus positive rate was 23.36%. The Ae. albopictus positive rate of used tire, temporary water container and vegetation water containers were higher than fixed water containers. The Ae. albopictus positive rates of mountains and peninsular were higher than that of plain. By logistic regression analysis, the Ae. albopictus positive rates of tire, temporary water container and vegetation water containers were 2.623 times （95%CI： 1.698-4.052）, 1.968 times （95%CI： 1.280-3.027）, and 1.759 times （95%CI： 1.046-2.958） higher than fixed water containers, respectively. The Ae. albopictus positive rates of mountains and peninsular were 1.507 times （95%CI： 1.034-2.197）, and 1.530 times （95%CI： 1.015-2.306） higher than plain, respectively. Conclusion The Ae. albopictus positive rate of Ningbo city was high. Doing a good job in eliminating Ae. albopictus larvae and eggs in early spring, actively, can control the mosquito density throughout the year, effectively.