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A Local Chikungunya Fever Outbreak Field Investigation - Fujian Province, China, 2025
Shenggen Wu1,2, Jiangyi Liu3, Zhangbin Tang4
1Fujian Center for Disease Control and Prevention, Fujian Provincial Key Laboratory of Zoonosis Research, Fuzhou City, Fujian Province, China.
China CDC Weekly
|April 9, 2026
Summary
Imported Chikungunya fever (CHIKF) can cause local outbreaks in China. Prompt mosquito control is vital to prevent transmission chains involving viremic humans and Aedes mosquitoes.
Area of Science:
- Epidemiology
- Vector-borne diseases
- Public Health
Background:
- Chikungunya fever (CHIKF) is present in China, with both imported and local cases documented in southern provinces.
- Urban CHIKF transmission involves viremic humans, the extrinsic incubation period (EIP), and the intrinsic incubation period (IIP).
Purpose of the Study:
- To analyze the dynamics of CHIKF transmission in a non-endemic area following the introduction of an imported case.
- To highlight the implications of imported CHIKF cases for public health practice and vector control.
Main Methods:
- Observational study of a CHIKF outbreak in Fujian Province.
- Analysis of transmission links including viremic humans and Aedes mosquito vectors.
Main Results:
- An imported CHIKF case in Fujian Province led to local transmission within approximately 9 days.
- The presence of local Aedes mosquitoes facilitated the rapid establishment of the transmission chain.
Conclusions:
- Imported CHIKF cases pose a significant risk for local transmission in areas with Aedes mosquito populations.
- Timely and targeted mosquito control measures are crucial to prevent outbreaks, especially during epidemic seasons.
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