关键词: 沃尔巴克氏体, 种群压制, 白纹伊蚊, 登革热, 高风险社区

Abstract: Objective To test the mosquito control efficacy of releasing PAB males of Aedes albopictus artificially infected with wPip and naturally infected with wAlbA and wAlbB strains of Wolbachia into communities at high risk for dengue (high mosquito density, high human population density, and high vegetation coverage), so as to provide a scientific basis for field application of Wolbachia-infected incompatible mosquitoes in class-Ⅰ high risk areas for dengue fever in China.Methods A sufficient quantity of artificially reared male PAB Ae. albopictus were released twice a week into the Jinsha Xincheng community of Chancheng District, Foshan, Guangdong Province, China. At the same time, the density of Ae. albopictus at the release site was monitored using both BG-Traps and mosq-ovitraps, and was compared with the monitoring data of the control site during the same period to assess the population suppression efficacy of the release of PAB males. The two-sided Mann-Whitney U test was used to compare the density of trapped adults and average egg hatches between the release and control sites.Results Through 16 releases of male PAB mosquitoes spanning 17 weeks, the mosquito density at the release site was decreased substantially. The adult mosquito density was decreased by up to 93.67%, with an average reduction of 71.62%. The larva density was decreased by up to 89.45%, with an average reduction of 77.15%.Conclusion Wolbachia-based PAB male of Ae. albopictus population suppression can effectively and sustainably control the density of Ae. albopictus in communities at high risk for dengue, greatly reducing the risk of local spread of dengue fever.

Key words: Wolbachia, Population suppression, Aedes albopictus, Dengue, High-risk community