首页|2019-2023年重庆市登革热媒介伊蚊监测结果分析

2019-2023年重庆市登革热媒介伊蚊监测结果分析

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目的 了解重庆市登革热媒介伊蚊密度、季节消长等规律,为制定登革热防控策略提供科学依据.方法 收集2019-2023年重庆市39个区(县)媒介伊蚊监测结果,该监测每年4-11月进行,每月开展1次,于全市选择不同生境对其媒介伊蚊成蚊和幼蚊分别采用双层叠帐法、布雷图指数法进行监测;通过中国疾病预防控制信息系统收集同期重庆市登革热病例资料并分析.结果 2019-2023年,重庆市媒介伊蚊成蚊平均帐诱指数为1.63只/(顶·h),居民区、旧轮胎堆放地/废品站/工地、公园/竹林的帐诱指数分别为2.23、1.82、0.83只/(顶·h);媒介伊蚊幼蚊平均布雷图指数为5.25,废旧物品堆放处和医院的平均布雷图指数分别为66.77、20.64,居民区、公园和工地的布雷图指数每年均处于相对较低水平,分别为4.38、4.12和2.46.2019-2023年重庆市报告登革热病例1 539例,其中输入性病例269例,本地病例1 270例;报告病例主要集中于2019年(输入性病例168例,本地病例1 243例)和2023年(输入性病例95例,本地病例27例);所有本地病例均在8-11月报告;输入病例数与本地病例数具有相关性(r=0.857,P<0.05).结论 夏秋季重庆市应重点做好居民区、医院、废旧物品堆放处等生境的媒介伊蚊监测与控制工作,将蚊媒密度控制在传播风险阈值以内,防范由输入性病例引起本地病例甚至点状聚集性疫情的发生.
Analysis on the surveillance results of dengue vector Aedes in Chongqing area from 2019 to 2023
Objective To understand the density and seasonal fluctuation of Aedes mosquitoes,vectors of dengue fe-ver,in Chongqing area for scientific basis to formulate corresponding prevention and control strategies for dengue fever.Methods The results of Aedfes vector surveillance were collected from 39 districts(counties)in Chongqing area from 2019 to 2023.The surveillance was monthly conducted every year from April to November.The adult and juvenile Ae-des vector mosquitoes were monitored in different habitats across the city by double-layer tent method and Breitau in-dex method,respectively.The data of dengue fever cases reported in Chongqing area in the corresponding periods were collected through China Disease Prevention and Control Information System and analyzed.Results From 2019 to 2023,the average net lure index of adult mosquitoes was 1.63 mosquitoes/(net·h),and the net lure index were 2.23,1.82 and 0.83 mosquitoes/(net·h),respectively,for residential areas,old tire dump/scrap station/construction sites and park/bamboo forests.The average Braito index of mosquito larvae was 5.25,and the average annual Braito index were 66.77 and 20.64,respectively for waste dumps and hospitals.The annually Braito index were relatively lower in residen-tial areas(4.38),parks(4.12)and construction sites(2.46).From 2019 to 2023,a total of 1 539 cases of dengue fever were reported in Chongqing area,including 269 imported cases and 1 270 local infections.Cases were mainly reported in 2019(168 imported cases and 1 243 local cases)and 2023(95 imported cases and 27 local cases).All local infections were concentrated between August and November.The number of imported cases was correlated with the number of lo-cal infections(r=0.857,P<0.05).Conclusion The surveillance and control of Aedes vector in residential areas,hospi-tals,waste dumps and other habitats should be intensified in Summer and Autumn to control the mosquito vector densi-ty within the transmission risk threshold.Meanwhile,the possibility of local cases or even spot clusters caused by im-ported cases should be prevented.

Dengue feverTransmission vectorAedesMonitoringChongqing City

肖汉森、涂涛田、王政、张应、魏晶、季恒青

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重庆市疾病预防控制中心消毒与媒介生物控制所,高致病性病原微生物重庆市重点实验室,重庆市公共卫生重点学科,重庆市疾病预防控制与公共卫生研究中心,重庆 400700

登革热 传播媒介 伊蚊 监测 重庆市

重庆市自然科学基金项目

cstc2021jcyjmsxmX1125

2024

热带病与寄生虫学
安徽省寄生虫病防治研究所

热带病与寄生虫学

CSTPCD
影响因子:0.816
ISSN:1672-2302
年,卷(期):2024.22(4)