江苏省疟疾疫情预警系统的建立Ⅷ江苏省传疟媒介监测

Establishment of malaria early warning system in Jiangsu Province Ⅷ Malaria vector monitoring in Jiangsu Province

目的了解江苏省传疟媒介的种群、密度以及季节消长与夜间活动规律,为该省消除疟疾提供科学依据。方法 2013-2015年,选择江苏省7个县(市、区)作为疟疾媒介监测点,采用夜间室外通宵帐内人饵诱捕法和诱蚊灯全通宵捕蚊法捕获按蚊,观察各监测点传疟媒介的季节消长和夜间活动规律。结果 2013-2015年,江苏省7个监测点采用诱蚊灯全通宵捕蚊法共捕获中华按蚊11 041只,未发现嗜人按蚊;捕获中华按蚊数量最多的地区为泗洪县,3年共捕获中华按蚊6 724只;最少的是盱眙县,3年共捕获34只。2013-2015年,江苏省中华按蚊密度高峰分别出现在7月上半月、8月上半月和7月下半月。该期间内7个监测点采用通宵帐内人饵诱捕法共捕获中华按蚊2 421只;泗洪县捕获中华按蚊最多,为1 085只;赣榆县捕获中华按蚊最少,为13只。江苏省中华按蚊夜间活动高峰出现在晚上19:00-20:00,在该时段共捕获中华按蚊525只,占捕获总数的21.68%;此后,捕获数量随时间的延后而逐渐减少。结论江苏省个别地区中华按蚊密度仍较高,应做好消除疟疾阶段疫情和媒介监测,防止输入性疟疾的本地传播。

Objective To understand the population, density, seasonal fluctuation and nocturnal pattern of malaria vectors in Jiangsu Province, thus to provide evidences for malaria elimination in this province. Methods Seven counties （cities, districts） were selected as the monitoring sites for malaria vectors in Jiangsu Province from 2013 to 2015. The mosquitoes were captured by human bait trapping in bed nets and mosquito？lured lamp overnight, and the seasonal fluctuation and nocturnal pattern of malaria vectors were observed. Results A total of 11 041 Anopheles sinensis mosquitoes were captured by the mosquito？lured lamps in 7 counties of Jiangsu Province from 2013 to 2015, and no An. anthropophagous was found. Among all the 7 monitoring sites, the number of An. sinensis captured in Sihong County was the most （6 742 mosquitoes）, while that in Xuyu County was the least （34 mosquitoes）. During this period, the density peaks of An. sinensis were the first half of July, the first half of August and the second half of July. A total of 2 421 An. sinensis were collected in 7 monitoring sites from 2013 to 2015 by human bait trapping in bed nets overnight. Among all the 7 monitoring sites, the captured number of An. sinensis in Sihong County was the most （1 085 mosquitoes）, while that in Ganyu County was the least （13 mosquitoes）. The nocturnal peak of An. sinensis was from 19：00 to 20：00 and 525 An. sinensis mosquitoes were captured during this period of time, which accounted for 21.68% of the total. Hereafter, the captured number of An. sinensis reduced over time. Conclusion The density of An. sinensis mosquitoes is still high in individual areas in Jiangsu Province, so the epidemic and vector monitoring still should be strengthened to prevent the local transmission of imported malaria.