Epidemiological characteristics of dengue fever in Zhejiang Province, 2011-2023
- Author:
YIN Shujuan
;
LIU Ying
;
XING Yuhang
- Publication Type:Journal Article
- Keywords:
Dengue fever;
epidemiological characteristics;
imported case;
indigenous cases
- From:
China Tropical Medicine
2024;24(11):1405-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To analyze the epidemic characteristics of dengue fever in Zhejiang Province from 2011 to 2023, and provide a scientific basis for formulating dengue prevention and control strategies in Zhejiang Province. Methods The data of dengue fever cases in Zhejiang Province from 2011 to 2023 were collected from the China Information System for Disease Control and Prevention. Descriptive and statistical analyses of the gender, age, occupation, seasonal distribution, regional distribution, and the time interval from onset to diagnosis of dengue fever imported cases and indigenous cases were conducted using SPSS26.0 software. Results A total of 3 021 cases of dengue fever were reported in Zhejiang Province from 2011 to 2023, including 1 421 imported cases and 1 600 indigenous cases. There were 1 692 males and 1 329 females, with a male-to-female ratio of 1.27∶1. The proportion of males among imported cases (62.28%) was higher than that of indigenous cases (50.44%) (χ2=42.838, P<0.001). The indigenous cases were mainly concentrated in 40 to <70 years old, while the imported cases were mainly concentrated in 20 to <50 years old, with the age of the indigenous cases being higher than that of the imported cases (Z=-18.435, P<0.001). The occupations of the cases were mainly business service, workers/migrant workers, retirees, domestic workers and unemployed people, and farmers. Among imported cases, the highest proportion was in business service workers (23.29%), while among local cases, the highest proportion was in retirees (24.38%). The occupational distribution difference between imported and indigenous cases was statistically significant (χ2=331.903, P<0.001). The indigenous cases predominantly occurred from August to October, while imported cases were reported throughout the year, mainly occurring from June to October, among which domestic imported cases mainly appeared from July to December, and imported cases from abroad could occur throughout the year. In addition to the period of COVID-19 prevention and control, the number of counties (cities and districts) reporting dengue cases in Zhejiang Province increased year by year from 2011 to 2023, with 96.67% of counties (cities and districts) reporting dengue cases, of which 51.11% counties reported indigenous cases. There was a statistically significant difference in the interval from onset to confirmation between imported cases and indigenous cases (Z=-3.269, P=0.001). Conclusions There are obvious seasonal, population, and regional distribution patterns of dengue fever in Zhejiang Province. Attention should be paid to the dynamics of dengue fever outbreaks in Yunnan border areas and Guangdong, and the control of imported cases, vector surveillance and control, and prevention and control work in key areas should be further strengthened. In 2023, the epidemic situation of dengue fever in Zhejiang Province is grim, with a substantial increase in imported cases and gradual expansion of epidemic coverage, which will remain the focus of infectious disease prevention and control in Zhejiang Province in the future.
- Full text:202511121025597771618.Epidemiological characteristics of dengue fever in Zhejiang Province, 2011-2023.pdf
