Abstract:

Objective To investigate the distribution of Aedes albopictus in the central city of Yuxi, providing scientific basis for prevention and control of dengue fever. Methods Mosquito larvae were captured indoor and outdoor water containers from north, south, west, east and central residential areas and special places in the central city; adult mosquito was collected by human landing collection and whole site at special places; and dengue virus was tested by specific nucleic acid detection for Ae. albopictus adult mosquitoes. Results Aedes albopictus was found in 3 villages at the north of the city and 1 residential area at the west of the city,the total container index(CI) was 0.37. In the east, south and center of the city, no Ae. albopictus was found. Total of 2 193 individuals of 7 species were collected from a waste tire processing factory and a salvage station in the north and west of the city, and Ae. albopictus accounted for 82.44%(1 808/2 193); the CI of larvae was 5.21, Breteau index reached up to 60.00 at waste tire processing factory in the north of the city. No dengue virus was detected in Ae. albopictus adult mosquitoes. Conclusion It was the first time found Ae. albopictus in the central city of Yuxi, and its density was high, it's hinted that there is a risk of dengue transmission and epidemic, and the attention should be paid by the relevant health departments.

Key words: Dengue fever, Aedes albopictus, Yuxi city

摘要：

目的 了解玉溪市中心城区白纹伊蚊分布情况，为防控登革热提供科学依据。方法 2015年8月在玉溪市中心城区的东、西、南、北、中5个方位的居民区和特殊场所室内外积水容器中捕获蚊幼虫，在特殊场所采用人工诱捕法和全捕法捕获成蚊；对白纹伊蚊成蚊进行登革热病毒（DENV）特异核酸检测。结果 城北的3个村及城西1个居民区均监测到白纹伊蚊，总容器指数（CI）为0.37；城东、城南和城中均未发现白纹伊蚊；在城北及城西的废旧轮胎加工厂和废品收购站人工捕获成蚊7种共2 193只，白纹伊蚊占总捕获数的82.44%（1 808/2 193），蚊幼虫CI为5.21，北城废旧轮胎加工厂布雷图指数高达60.00；白纹伊蚊成蚊未检出DENV特异性核酸。结论 玉溪市中心城区首次监测到白纹伊蚊且密度较高，存在登革热传播及流行的风险，应引起高度关注。

关键词: 登革热, 白纹伊蚊, 玉溪市