Objective To grasp the environmental distribution and density fluctuation of Aedes albopictus in Minhang district, Shanghai, China, and to provide a reference for scientific prevention and control of dengue epidemic. Methods From May to October 2018, the Breteau index (BI) method and the mosquito ovitrap index (MOI) method were applied to monitor Ae. albopictus larvae in residential areas, hospitals, and schools, and from April to November 2018, the carbon dioxide trapping method was adopted to monitor adult Ae. albopictus in residential areas, rural households, and hospitals, in order to observe the distribution characteristics and population density fluctuation of Ae. albopictus in different seasons. Results Both BI and MOI in Minhang district showed a unimodal trend. BI peaked in July (peak value 17.82) and MOI peaked in August (peak value 13.50). Both indices were found highest in schools and kindergartens (BI:17.57; MOI:11.84). Adult Ae. albopictus density measured by the carbon dioxide trapping method showed a unimodal trend. The peak value (2.40) was observed in August, and the highest density (3.84) was found in residential areas. Conclusion During the peak period of dengue epidemic, scientific and effective methods should be adopted to monitor the density fluctuation of Ae. albopictus, and comprehensive control should be carried out based on the monitoring data to effectively prevent outbreak of dengue fever in the local area.
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