Autochthonous chikungunya virus outbreak in Verona province, Italy, 2025
Journal of Travel Medicine·
- DOI
- 10.1093/jtm/taag079
- PMID
- —
- PMCID
- —
- OpenAlex
- —
- Study type
- Genomic study
- Publisher
- Oxford University Press (OUP)
- Article type
- journal-article
- Integrity
- current
Why this research matters now
The report illustrates how coordinated monitoring networks can quickly characterize emerging arboviral activity in non-endemic areas, offering insights into optimal diagnostic windows and the importance of continuous pathogen tracking.
Structured evidence summary
Research question
How did integrated monitoring capture the epidemiological and genetic features of a localized chikungunya transmission event in northern Italy during 2025?
Study design
An outbreak investigation combining activated surveillance protocols with retrospective laboratory and phylogenetic analysis following initial case identification.
Population and setting
Individuals residing in Verona province, Italy, between late July and mid-October 2025, predominantly located in two specific municipalities with an average patient age of fifty-five years.
Main findings
Investigators documented sixty-nine cases across a fifteen-week period, noting strong geographic clustering and clear temporal concentration during late summer. Laboratory testing indicated viral RNA presence in bodily fluids during the initial week of illness, while serological markers emerged slightly later. Genetic sequencing demonstrated that the circulating strain formed a tight evolutionary group closely matching recent viral sequences from Réunion Island.
Public-health relevance
The report illustrates how coordinated monitoring networks can quickly characterize emerging arboviral activity in non-endemic areas, offering insights into optimal diagnostic windows and the importance of continuous pathogen tracking.
Important limitations
The original source of infection could not be traced, and environmental mosquito collections failed to yield positive viral results. Initial symptom onset dates relied on retrospective recall rather than real-time reporting.
GIDS interpretation
This publication supplies historical genomic and epidemiological context for a specific European transmission episode, linking local circulation to prior South Asian and Indian Ocean viral lineages. Such records aid in establishing baseline diversity patterns and understanding seasonal movement trends without implying current active threat levels.
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 10 auditable classifier relationships to diseases, places, topics, and study design.