关键词: 白纹伊蚊, 孳生地, 影响因素, 蚊密度, 住宅

Abstract: Objective To investigate the population density of Aedes albopictus in different months in Yiwu, Zhejiang province, China, and analyze its influencing factors, and to provide a scientific basis for the prevention and control of mosquito-borne diseases in Yiwu. Methods The villages or communities in four streets in Yiwu were selected in different geographical locations as surveillance sites. Mosquito surveillance was carried out once a month in the middle of the month from April to November in 2017, with 100 households being surveyed each time. Breteau index (BI), container index (CI) and house index (HI), were calculated to analyze the population densities of Ae. albopictus in different habitats and containers. SPSS 24.0 software was used to conduct chi-square test to analyze the breeding status in different containers. Results Mean BI was 13.75 in Yiwu from April to November, 2017. The BI in July and October was high (18.00 and 23.00, respectively), and the BI in all months was greater than 5 except for that in April. The containers with Ae. albopictus were mainly cisterns, tanks, basins, and unused containers with water, tires, miniascape, and aquatic plants, among which, the CI of miniascape and aquatic plants was highest and up to 20.00%. However, there was no significant difference in the positive rate between different types of containers with water (χ²=6.373, P=0.383). The mean BI in all habitats was greater than 5, of which, the commercial houses around residential buildings and high-end villas had the highest BI (44.00 and 26.37, respectively). Conclusion The population density of Ae. albopictus was high in Yiwu in 2017. Comprehensive measures should be adopted to clean up the breeding sites of Ae. albopictus to reduce the risk of local outbreaks of mosquito-borne diseases.

Key words: Aedes albopictus, Breeding site, Influencing factor, Mosquito density, Residential building