关键词: 埃及伊蚊, 分布调查

Abstract:

Objective To investigate the distribution of Aedes aegypti in Mangshi to inform dengue fever control. Methods Aedes adult mosquitoes were captured by human-landing catches around villages at both designated and random locations in the daytime to identify the composition and distribution of local mosquito species. Aedes larvae were collected in various types of water container inside and outside residential areas to calculate the mosquito larvae container positive index (CI), breteau index (BI), house index (HI) and thousand-person index. Results In designated villages, 38 adult mosquitoes from four species were captured, including 18 Ae. albopictus (47.37%); seven Aedes larva-positive water containers were found from 408 water containers, and the larval CI, BI, HI and thousand-person index were 1.72, 0.92, 1.23, and 12.26, respectively. In random locations, 4132 adult mosquitoes were collected, including seven Ae. aegypti (0.17%) and 2614 Ae. albopictus (63.23%); 170 water containers were investigated outside the villages, in which 20 water containers were positive with a larva-positive container index of 11.76. Nine positive containers were found from 152 water containers in 31 households, and the larva-positive CI, BI, HI and thousand- person index were 5.92, 6.12, 22.58, and 60.80, respectively. Conclusion Ae. aegypti were found in Mangshi for the first time. Ae. albopictus was widely distributed and locally predominant. Thus, the competent authority shall strengthen vector monitoring for aggressive dengue fever control.

Key words: Aedes aegypti, Distribution survey