攀枝花市登革热媒介白纹伊蚊分布现状调查

Investigation on the distribution of dengue vector Aedes albopictus in Panzhihua City

目的掌握攀枝花市登革热媒介白纹伊蚊的分布状况,为控制登革热提供科学的预警信息。方法在2018年4-11月每月中旬开展调查,伊蚊幼虫密度采用布雷图指数法(BI)、容器指数法(CI)、房屋指数法(HI)监测,成蚊密度采用双层叠帐法监测。结果攀枝花市白纹伊蚊在调查时段的每月均有活动,季节性消长明显,呈单峰型,峰值在7月(BI=18.70、CI=21.40、HI=18.70),帐诱指数为13.00只/(帐·h);伊蚊幼虫密度居民区住户外(BI=16.20)>居民区住户内(13.91)>公园/绿化带(5.36),成蚊密度居民区住户外(帐诱指数7.00)>公园/绿化带(5.25)等。结论攀枝花市白纹伊蚊分布广泛,6-8月存在登革热输入和本地传播风险,应加强登革热监测与预警和环境综合治理,以及风险评估和健康教育等工作,预防输入性病例引起本地暴发流行。

Objective To understand the distribution of dengue vector Aedes albopictus in Panzhihua City and provide scientific early warning information for dengue fever control.Methods Surveys were conducted from June to November of 2018.The larval density of Aedes mosquitoes was monitored by Breteau index(BI),container index(CI)and housing index(HI),and the adult density was monitored by double-layer netting.Results Aedes albopictus was found active in the investigated period in Panzhihua City,with obvious seasonal fluctuation.The density peak occurred in July(BI=18.70,CI=21.40,HI=18.70),and the mosquito-net trapping index was 13.00 insects per net in an hour.The highest density of Aedes larvae was found in outside residential area(BI=16.20),followed by inside residential area(13.91)and park/green belt(5.36).The density of adult mosquitoes outside residential area was 7.00(net trap index)more than that in park/green belt(5.25).Conclusion Aedes albopictus is widely distributed in Panzhihua City.There are risks of dengue fever importation and local transmission from June to August.It is necessary to strengthen dengue fever monitoring and early warning,comprehensive environmental management,risk assessment and health education to prevent local outbreaks caused by imported cases.