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目的:研究1999年福州市近郊登革热的流行特征与媒介蚊虫的关系,以控制登革热的再次流行.方法:访视现症病人,开展房屋指数、容器指数、布雷图指数测定.检测病人血清中的IgM与IgG,从病人血清及白纹伊蚊体内分离病毒.设5个监测点,调查孳生场所,全年观察幼虫的季节消长规律.结果:经流行病学研究与病原学检测确认,本次流行的病原为Ⅱ型登革病毒,传播媒介是白纹伊蚊.罹患率为3.56％,以20~49岁年龄组为主,女性发病率高于男性,职业分布以农民、商人为主,分别占 45.84％和21.05％,呈一定的家庭聚集性,病例集中在8~9月,分别占47.68％和38.15％.在各种材料容器的水体中,广泛发现白纹伊蚊孳生.1月见少量幼虫;2月仍有残存幼虫;3月开始繁殖;4月上旬出现成蚊,密度逐渐上升,6月初与9月下旬分别出现主次高峰,11~12月下旬仍可发现幼虫;成蚊9月上旬密度最高;病家周围环境以白纹伊蚊幼虫孳生最多,流行特征与蚊媒种群密度的关系,呈互为制约作用.结论:本次流行有着明显的年龄、性别、职业、季节和家庭聚集等特征,发病与疫区白纹伊蚊孳生地多,密度高,人群普遍易感及气候条件等因素有着直接的关系.","Objective:To investigate and study the first epidemic reason of dengue fever in Fuzhou after happened 55 years, discouery therelations between epidemic feature and mosquiroes' specy, analyse the epidemic developing trend, and take effectiveive measure to control dengue fever. Methods:The patients were visited and IgM and IgG were detected. The mosquitoes were captured and the virus was isolated from mosquitoes anderum of patients. The arganisms'habits of Aedes albpictus are detected around 1 year. Results:The pathogen is typc-B virus of donguo fever, the ineidence is 3. 56%. The female incidence is higher than male. Aedes albopictus is the main vector. There are a lot of mosquitoes-breeding places. The susceptibility of residents is higher and the meteoric conditions are suitalbe for the epidemic.