2008年四川省登革热蚊媒监测结果分析

Analysis of surveillance results of dengue fever in Sichuan province

目的调查四川省登革热媒介白纹伊蚊的分布情况,为登革热的防治提供依据。方法在全省选择10个监测点,采用定时、定点、定人调查法,对白纹伊蚊孳生环境中的幼虫指数和成蚊密度进行监测。结果10个监测点幼虫的容器指数为27.50%,成蚊总密度为8.08只/人工小时。以废旧轮胎容器指数最高,为60.28%;特殊场所和养殖耕种区密度较高,分别为18.17和10.08只/人工小时;夏季密度也较高,峰值达到9.79只/人工小时;白纹伊蚊的密度有地区差异,但无地理位置差异;各个监测点幼虫与成蚊密度高低有一定的相关性。结论白纹伊蚊在四川省分布广泛,一旦有登革热病例输入,就可能造成疫情扩散。因此,应加强监测。

Objective To investigate the distribution of the vector mosquito of Dengue,Aedes albopictus,in Sichuan province,providing data for the prevention and control of dengue fever. Methods The larval index and adult densities of Ae. albopictus in its breeding grounds were monitored at ten representative observation spots by specified technicians. Results The container index was 27.50% at the ten monitoring spots,the overall adult mosquito density 8.08 per man-hour. The highest container index,60.28%,was observed in discarded tires. Relatively higher densities of mosquitoes were found at special places and breeding and farming areas,being 18.17 and 10.08 per man-hour,respectively. The density was also high in summer,reaching a peak of 9.79 per man-hour. Regional variations in population densities of Ae. albopictus were observed,yet without geographic variations. The larval and adult density were correlated to a certain extent at various monitoring spots. Conclusion Ae. albopictus is widely distributed in Sichuan province,and may result in outbreaks of Dengue in case of imported cases. Therefore,we should strengthen surveillance of mosquito vectors.