• 媒介生物监测 •

### 四川省广元市2018－2020年登革热媒介伊蚊生态学特征分析

1. 广元市疾病预防控制中心传染病防制所, 四川 广元 628000
• 收稿日期:2021-03-13 出版日期:2021-12-20 发布日期:2021-12-15
• 通讯作者: 贾永朝,E-mail:452164352@qq.com
• 作者简介:罗兴,男,主管医师,主要从事传染病防控工作,E-mail:623775947@qq.com

### Bionomic characteristics of dengue vector Aedes mosquitoes in Guangyuan of Sichuan province, China, 2018-2020

LUO Xing, LIU Yan-chun, JIA Yong-chao

1. Division of Infectious Disease, Guangyuan Center for Disease Control and Prevention, Guangyuan, Sichuan 628000, China
• Received:2021-03-13 Online:2021-12-20 Published:2021-12-15

Abstract: Objective To investigate the species, distribution, and seasonal variation of density of larvae and adult mosquitoes of dengue vector Aedes in Guangyuan of Sichuan province, China, and to provide suggestions for the prevention and control of dengue fever. Methods In the middle ten days from May to October in 2018-2020, Lizhou district of Guangyuan was selected as the surveillance site, and field surveillance was conducted according to Guidelines for dengue vector Aedes surveillance issued by Chinese Center for Disease Control and Prevention, in strict accordance with the investigation method of fixed time, fixed location, and designated personnel. Breteau index (BI) was used to monitor larval Aedes mosquitoes, and the double mosquito net method was used to monitor adult Aedes mosquitoes. WPS 2020 software was used to collect surveillance results, and SPSS 16.0 software was used for statistical analysis with the t-test and the Chi-square test. The t-test was used to compare mean BI, and the Chi-square test was used to compare the mean rates of container index (CI) and house index (HI). Results Only Ae. albopictus was found in Guangyuan in 2018-2020. Aedes larvae had a mean BI of 25.62, a mean CI of 17.91%, and a mean HI of 14.59%, and the mean net trap index of adult Ae. albopictus mosquitoes was 0.87 mosquitoes/trap·hour. The peak density of Ae. albopictus larvae was observed in July and August every year, and the peak density of adult Ae. albopictus was observed in July. Urban residential areas had a statistically higher mosquito density than rural area (all P<0.001). Among the different container types, other water bodies had the highest CI of 30.30%, followed by waste tires (28.24%), and idle containers (18.79%), bonsai (16.50%), open channels (13.68%), and storage tanks (12.99%); stagnant water was observed in green belt and bamboo head/stone hole, but without positive results. Conclusion The dengue vector Ae. albopictus is observed in Guangyuan and has a relatively high density. In the event of a case of dengue fever, there is a risk of a local epidemic of dengue fever. It is necessary to strengthen the monitoring and early warning of dengue fever cases, strengthen the environmental improvement of mosquito breeding areas, reduce the density of dengue fever vector Aedes, and prevent the outbreak of dengue fever.