Epidemic characteristics and healthcare-seeking behavior of dengue fever cases in Zhejiang Province in 2024
10.3760/cma.j.cn231583-20250305-00083
- VernacularTitle:2024年浙江省登革热流行特征和就诊情况分析
- Author:
Song GUO
1
;
Ying LIU
1
;
Jiangping REN
1
;
Rong ZHANG
1
;
Xuguang SHI
1
;
Jimin SUN
1
Author Information
1. 浙江省疾病预防控制中心 浙江省传染病疫苗与预防控制研究重点实验室，杭州 310051
- Publication Type:Journal Article
- Keywords:
Dengue fever;
Vector-borne infectious disease;
Epidemic characteristics;
Healthcare-seeking
- From:
Chinese Journal of Endemiology
2025;44(10):831-835
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To study the epidemic characteristics and healthcare-seeking behavior of dengue fever cases in Zhejiang Province, and to provide a scientific basis for developing dengue fever prevention and control strategies.Methods:Data on dengue fever epidemic in Zhejiang Province from January to December 2024 were collected from the Information System for China Disease Control and Prevention and individual case reports. Descriptive epidemiological methods were used to analyze the distribution by the three dimensions (time, region, and population), healthcare-seeking behavior, importation sources, and laboratory test results of dengue fever cases in Zhejiang Province.Results:From January to December 2024, Zhejiang Province reported a total of 289 dengue fever cases (including 25 foreigners), with an incidence rate of 0.44/100 000, including one severe case and no death, and 13 were local, 108 were domestically imported, and 168 were internationally imported. The epidemic had affected 70 districts (counties, cities) across all 11 cities in the province. Cases were reported monthly, with the peak incidence concentrated from July to November. The age of dengue fever cases was 38 (30, 48) years old, ranging from 2 to 75 years old, with a higher incidence in the 30 - 39 age group (31.14%, 90/289). The male-to-female ratio was 1.86 ∶ 1.00 (188 ∶ 101). Occupational distribution was predominantly commercial service workers (28.03%, 81/289). The number of healthcare-seeking for local cases was 2 (1, 2) times, ranging from 1 to 6 times. The number of healthcare-seeking for imported cases was 1 (1, 2) times, ranging from 1 to 4 times. The interval between the onset and diagnosis of local cases was 3.5 (1.0, 5.0) days, ranging from 0 to 6 days. The interval between the onset and diagnosis of imported cases was 3(1, 4) days, ranging from 0 to 6 days. Domestically imported cases originated from Guangdong Province (102 cases), Yunnan Province (3 cases), Hunan Province (1 case), with 2 cases had unknown original provinces. Internationally imported cases mainly came from Indonesia (33 cases), Thailand (22 cases), Laos (18 cases). Serotyping of dengue virus was determined for 283 cases, with 157 cases of type Ⅰ, 88 cases of type Ⅱ, 34 cases of type Ⅲ, and 4 cases of type Ⅳ.Conclusions:The dengue fever cases in Zhejiang Province in 2024 is primarily international importation, the interval between the onset and diagnosis of local cases is relatively long. Prevention and control efforts should strengthen surveillance and early warning based on dengue fever's epidemic characteristics, and reinforcing port quarantine, mosquito vector control, and health education for high-risk populations.
