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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 understand the overwintering situation of Aedes albopictus in Ningbo and to provide a scientific basis for the prevention and control of mosquito and vector borne diseases. Methods From February to March, 2016, five kinds of habitats, four kinds of water storage containers, water lakes and muddy mosquito larvae from 11 counties (cities and districts) in Ningbo were collected and hatched in laboratory. Results A total of 1528 valid samples were collected. The positive rate of Aedes albopictus was 23.36%. The positive rates of waste tire, temporary water container and Aedes albopictus were higher than that of fixed water storage container. Logistic regression analysis showed that the positive rates of Aedes albopictus in three kinds of containers were fixed water 2.623 (95% CI: 1.698 to 4.052), 1.968 (95% CI: 1.280 to 3.027) and 1.759-fold (95% CI: 1.046 to 2.958) for the container. The positive rates of Aedes albopictus in mountainous and peninsula were higher than those in plain, which were 1.507 (95% CI: 1.034 ~ 2.197) and 1.530 times (95% CI: 1.015 ~ 2.306) in plain, respectively. Conclusion The prevalence of overwintering Aedes albopictus in Ningbo City is at a high level, and the disinfection work on eggs and larvae of Aedes albopictus should be actively carried out in order to effectively control the mosquito density throughout the year.