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目的对北京市机场口岸蚊媒本底情况以及蚊媒病原体携带情况进行调查分析,评价北京市是否存在登革热和疟疾传播的蚊媒,为机场口岸蚊媒传播疾病预测预警提供依据。方法采用CO2灯诱法,对捕获的白纹伊蚊进行登革热病毒核酸检测和病毒分离,对中华按蚊进行4种疟原虫核酸检测。结果共捕获成蚊22 715只,密度指数为44.54只/(灯.h),淡色库蚊为优势种占87.95%;其次是三带喙库蚊,占10.64%;中华按蚊、白纹伊蚊分别占1.11%、0.30%。成蚊密度高峰期为8、9月。蚊媒疟原虫、登革热病原携带状况检测结果均为阴性。结论北京市机场口岸存在登革热和疟疾传播的蚊媒,北京市存在由输入性病例(境外感染病例及外省感染病例)引起登革热、疟疾本地传播的风险。应继续加强对机场口岸蚊媒密度监测以及蚊媒病原携带状况监测。
Objective To investigate the background of mosquito nets and the carriage of mosquito vectors in Beijing ports and evaluate the presence of mosquito vectors of dengue and malaria transmission in Beijing and provide evidence for the prediction and warning of mosquito-borne diseases at airports. Methods CO2 lamp induced method was used to detect dengue virus nucleic acid and virus isolated from Aedes albopictus. Four species of Anopheles sinensis were detected. Results A total of 22 715 adult mosquitoes were collected, with a density index of 44.54 / (lamp.h), dominant species of Culex pipiens pallens (87.95%), Culex trifolii (10.64%), Anopheles sinensis Mosquitoes accounted for 1.11% and 0.30% respectively. Adult mosquito density peaked in August and September. Mosquito-malaria parasites, dengue pathogen detection results were negative. Conclusions There are mosquito vectors of Dengue Fever and malaria transmission at the airport port of Beijing. There is a risk of dengue fever and malaria transmission in Beijing due to imported cases (cases of overseas infections and cases of other provinces). Mosquito density monitoring at airports and monitoring of mosquito-borne pathogens should continue to be strengthened.