Epidemiological characteristics of imported dengue fever cases and surveillance on vector Aedes from 2015-2021 in Wuhu City,Anhui Province
TONG Fei
WANG Fei
LI Yong
CHEN Xingfu
CHEN Yuheng
TAO Hao
Abstract：Objective To analyze the epidemiological characteristics of imported dengue fever cases in Wuhu City from 2015 to 2021,understand the distribution characteristics of vector Aedes,and provide scientific basis for dengue fever risk assessment and epidemic prevention and control.Methods Descriptive epidemiological methods were adopted to analyze the epidemiological characteristics of imported dengue fever cases,and Breitu index method to monitor vector Aedes and collect data for statistical analysis.Results From 2015 to 2021,a total of 12 dengue fever cases were reported in Wuhu City,all of which were imported cases;The cases were mostly concentrated from July to October,with a total of 9 reported cases,accounting for 75.0%of the total reported cases;There were 11 male and 1 female input cases,and cases concentrated in the age group of 20-49 years old;11 cases were imported from Southeast Asian countries,and 1 case was imported from other provinces in China.No Aedes aegypti were found during vector monitoring;The average Breitmap index range from 9.5 to 19.1,with July August being the period of high average Breit index(16.1 to 19.1)and October being the lowest average Breitmap index(7.0);The type of breeding ground for mosquito larvae surveyed showed the highest number of stagnant water in idle containers(2483 locations),accounting for 57.1%of the total amount of stagnant water;The highest number of positive cases(448)were found in the breeding of Aedes larvae,with a positive rate of 18.0%.Conclusion The imported dengue cases in Wuhu City are mainly imported from Southeast Asian countries,and the time and place of import are uncertain.There are no imported case reports affected by the COVID-19 in 2020-2021.The main vector Aedes albopictus has a variety of types and a large number of breeding places in Wuhu City.The average density of Aedes albopictus is high in July August every year,suggesting that there may be an outbreak of local dengue fever,In the future,it is necessary to continue to strengthen the monitoring of imported cases and improve the vector Aedes monitoring network,and timely carry out epidemic risk assessments.
Keywords：dengue feverimported casesepidemiologyvector Aedessurveillance
Publication Date：2023-12-20
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 549-552 )