Epidemiological characteristics and transmission dynamics of the early stage Chikungunya fever outbreak in Foshan City, Guangdong Province, China in 2025
Infectious Diseases of Poverty·
- DOI
- 10.1186/s40249-025-01364-y
- PMID
- 40936090
- PMCID
- PMC12424219
- OpenAlex
- W4414159390
- Study type
- Journal article
- Publisher
- Springer Science and Business Media LLC
- Article type
- journal-article
- Integrity
- current
Why this research matters now
The findings describe groups, locations, transmission estimates, and reporting delays that may be relevant to outbreak characterization and response planning in the reported Foshan setting. The abstract does not establish how broadly these findings apply beyond this outbreak and location.
Structured evidence summary
Research question
The study examined the epidemiological patterns and transmission dynamics of the early 2025 chikungunya fever outbreak in Foshan, Guangdong, including demographic, spatial, temporal, reporting-delay, and estimated reproduction-number characteristics.
Study design
This was an observational outbreak analysis using reported chikungunya fever case data from Foshan between July 8 and July 26, 2025. The analysis included demographic and spatiotemporal descriptions, incidence calculations, reporting-delay comparisons, spatial autocorrelation, and maximum-likelihood estimation of R0, with comparison to a 2010 outbreak in Dongguan.
Population and setting
The study covered 4,754 locally reported cases in Foshan City, Guangdong Province, China, during the early stage of the 2025 outbreak. Case information came from the National Notifiable Infectious Disease Reporting System.
Main findings
The highest reported incidence was among people aged 65 years or older, at 116.57 per 100,000 population. Cases initially detected in Shunde District expanded to other Foshan districts, with statistically significant township-level spatial clustering. The estimated R0 was 16.3 (95% CI 15.0-17.5), and the median onset-to-report interval declined from 4 days to 1 day after response measures were introduced; the abstract reports this temporal change but does not establish that the measures caused it.
Public-health relevance
The findings describe groups, locations, transmission estimates, and reporting delays that may be relevant to outbreak characterization and response planning in the reported Foshan setting. The abstract does not establish how broadly these findings apply beyond this outbreak and location.
Important limitations
The supplied abstract does not state explicit study limitations. This summary is limited to the supplied single-article abstract and metadata; the original paper is required for decision-grade assessment of case ascertainment, representativeness, missing data, analytic assumptions, and the comparison with the 2010 outbreak.
GIDS interpretation
The article is discoverable as a peer-reviewed 2025 journal report concerning chikungunya in China, with links to outbreak investigation, transmission dynamics, and surveillance topics. These classifications provide context for retrieval only and do not connect the article to a live surveillance signal or confirm surveillance data.
Related GIDS surveillance
Literature context does not validate, explain, or change a surveillance signal. Exact and contextual relationships are shown separately.
Evidence relationships
This article has 14 auditable classifier relationships to diseases, places, topics, and study design.