Abstract: Objective To investigate the changes in the population density indices of Aedes albopictus and their influential factors in Ningbo city, China, and to provide a basis for the control of dengue vector. Methods The densities of Ae. albopictus larvae in different environments in Ningbo were monitored and investigated, and the relationship between the changes in densities and climate and environment were analyzed. Results The container index (CI), house index (HI), and Breteau index (BI) for Ae. albopictus in Ningbo were 9.26%, 8.88%, and 10.57, respectively, in 2011, and the total density of Ae. albopictus larvae reached the peak value in August. The density in the permanent container was significantly higher than that in the temporary container, with the maximum value in the pool and tank; the density in resident community was significantly higher than that in the park, construction site, and salvage station, with the minimum value in the school and hospital. Conclusion The population density of Ae. albopictus and its seasonal fluctuation were influenced by multiple factors.

Key words: Dengue fever, Aedes albopictus, Density index

摘要： 目的 掌握宁波市白纹伊蚊种群密度指数变动规律及其影响因素, 为登革热媒介防控提供依据。 方法 对宁波市不同生境的白纹伊蚊幼虫密度进行监测, 对幼虫密度变动规律及其与气候、环境的关系进行分析。结果 2011年宁波市白纹伊蚊容器指数、房屋指数和布雷图指数分别为9.26%、8.88%和10.57, 于8月达到密度高峰;永久性容器密度明显高于暂时性容器, 且以水池、水缸最高;居民区密度明显高于公园、建筑工地、废品收购站, 学校、医院等特殊单位最低。结论 登革热媒介白纹伊蚊种群密度与季节消长规律由多方面影响因素综合作用所致。

关键词: 登革热, 白纹伊蚊, 密度指数