Objective To analyze the Aedes surveillance data of dengue fever outbreak in urban Ningbo, Zhejiang province, China, and compare the effects of three vector control measure packages on the density of adult Aedes mosquitoes and Breteau index (BI), and to provide a basis for formulating emergency management of dengue in the locality. Methods Three different comprehensive measure packages were used to control mosquitoes:measure package 1 included ultra-low-volume spraying, thermal fogging, slow-release agent, and environmental management; measure package 2 included ultra-low- volume spraying, residual spraying, slow-release agent, and environmental management; measure package 3 combined the 5 methods mentioned in measure package 1 and 2. The decline rate with net trap index and control effect with BI were compared between the 3 measure packages using ANOVA or rank sum test and curve fitting, respectively. Results There were no significant differences in the decline rate with net trap index between the 3 measure packages on the first day (0.24±0.41, 0.20±0.64, 0.47±0.17; F=1.659, P=0.206) and second day (0.27±0.27, 0.55±0.27, 0.47±0.39; F=2.236, P=0.123); significant difference was found on the third day (0.31±0.57, 0.44±0.46, 0.77±0.27; F=3.397, P=0.046), and measure package 3 showed the highest decline rate. Time to safety threshold of BI (decrease to less than 5) for the 3 measure packages were 3.58, 3.36, and 2.62 d, respectively, with the shortest time for measure package 3. Conclusion Combination of ultra-low-volume spraying, thermal fogging, residual spraying, slow-release agent, and environmental management works for Aedes control in the emergency response of the dengue fever outbreak.
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