广东省佛山市某镇白纹伊蚊密度季节消长情况调查分析

Seasonal Fluctuation of Aedes albopictus in A Town of Foshan City,Guangdong Province

目的了解和掌握佛山市某镇白纹伊蚊的季节消长情况,为当地开展登革热防控工作提供依据。方法用诱捕器进行4d为一周期的成蚊诱捕以及诱卵现场实验,并根据季节的诱捕结果估算白纹伊蚊的密度消长情况。结果 2008年秋季至2009年夏季,4次实验共捕获成蚊282只,包括白纹伊蚊161只;收集蚊卵5954个。实验结果显示四个季度之间蚊媒密度的差异具有统计学意义。其中,诱蚊诱卵指数(MOI)(χ2=52.172,P<0.000),诱蚊指数(MI)(χ2=47.664,P<0.000),诱卵指数(OI)(χ2=44.525,P<0.000),诱蚊密度指数(MDI)(F=17.448,P<0.000),蚊卵密度指数(EDI)(F=13.454,P<0.000)。结论当地白纹伊蚊夏秋两季的阳性指数与密度指数均比冬春两季高且差异具有统计学意义。其中,夏末秋初是蚊媒密度的高峰。本次实验结果与传统监测指标所反映的密度变化趋势一致。

Objective This study was designed to investigate the seasonal fluctuation of Aedes albopictus in a town of Foshan city and to provide some basic data for the prevention and control of dengue fever in local place. Methods A cycle of 4-day trapping of adult mosquito with trapping containers as well as oviposition trapping were used to estimate the seasonal fluctuation of the density of Aedes albopictus. Results A total of 282 adult mosquitoes were captured in four individual studies,including 161 adult mosquito and 5 954 mosquito eggs,between the autumn of 2008 to summer of 2009. A significant difference in the density of mosquitoes was observed,mosquito and oviposition positive index （MOI） （χ2=52.172,P 0.000）; mosquito-trap positive index （MI） （χ2=47.664,P 0.000）; oviposition index （OI） （χ2 =44.525,P 0.000）; mosquito-trap density index （MDI） （F =17.448,P 0.000）; egg density index （EDI） （F =13.454,P 0.000）. Conclusion Both the positive indices and density indices of local Aedes albopictus in the summer and autumn were significantly higher than those in the winter and spring. The density of mosquitoes reached the peak in late summer and early autumn. Results obtained from the present study are in agreement the traditional surveillance indices.