Epidemiological characteristics of dengue fever in Hainan Province from 2008 to 2023
Objective To provide a scientific basis for improving the prevention and control strategies of dengue fever by analyzing the epidemiological characteristics and influencing factors of reported cases in Hainan Province from 2008 to 2023.Methods Descriptive epidemiological methods were used to analyze the temporal,spatial,and demographic distribution characteristics and influencing factors of reported dengue fever cases in Hainan Province from 2008 to 2023.Spearman correlation analysis was used to explore the correlation between local cases and imported cases.ArcGIS 10.8 and R 4.3.0 were used for graphic production,and SaTScan 10.1.3 software was used for spatiotemporal scanning analysis.Results From 2008 to 2023,a total of 810 cases of dengue fever were reported in Hainan Province,including 164 imported cases and 646 local cases.The 646 local cases reported from June to December,showed a significant seasonal pattern,with September to October being the peak months.The cases were mainly distributed in Haikou City(41.18%)and Ledong County(39.32%).There were two large-scale outbreaks of dengue fever in 2019 and 2023,with 302 and 328 local cases reported respectively(accounting for 97.52%of the total local cases).The male-to-female ratio of local cases was 1.57∶1,and cases in the age group of 25 to under 65 accounted for 69.50%of the total.The top three occupations of local cases were housework and unemployment(17.65%),migrant workers(17.34%),and business services(13.78%).From 2008 to 2023,a total of 164 imported cases were reported,with cases reported every month.The peak months were from June to November,accounting for 82.32%of the total imported cases.A total of 66 domestically imported cases were reported,originating from Guangdong Province,Yunnan Province,and Guangxi Zhuang Autonomous Region;98 cases were overseas imports,mainly from Thailand and Cambodia.The male-to-female ratio of imported cases was 1.65∶1,and cases in the age group of 25 to under 55 accounted for 68.29%of the total.The top three occupations of imported cases were business service(33.54%),housework and unemployment(10.37%),and farmers(9.76%).From 2008 to 2013,the years when domestic imported cases were reported in Hainan Province were 2014,2018,2019,and 2023,coinciding with the years local cases were reported from 2008 to 2013.There was a positive correlation between local cases and domestic imported cases(r=0.892,P<0.001),while no statistically significant correlation was found with overseas imported cases.Spatiotemporal scanning analysis detected 5 clusters,concentrated in September to October in the years 2019 and 2023.Conclusions Dengue fever is prevalent in Hainan Province,mainly caused by imported cases leading to local outbreaks without forming local epidemics.It exhibits significant seasonal characteristics.Imported cases mainly originate from Cambodia,Thailand,and other Southeast Asian countries,as well as domestically from Guangdong Province,Yunnan Province,and Guangxi Zhuang Autonomous Region.Local cases are mainly distributed in coastal cities and counties.
Dengue feverepidemiological characteristicsspatiotemporal scanningHainan Province
NETL
NSTL
万方数据
