Autochthonous transmission patterns of dengue virus serotype 2 in Italy: evidence from outbreaks in 2024
Eurosurveillance·
- DOI
- 10.2807/1560-7917.es.2026.31.27.2600035
- PMID
- —
- PMCID
- —
- OpenAlex
- —
- Study type
- Journal article
- Publisher
- European Centre for Disease Control and Prevention (ECDC)
- Article type
- journal-article
- Integrity
- current
Why this research matters now
Within the study's analysis, the results indicate that early detection and vector-control measures were associated with lower transmission during the reported Italian outbreaks. The findings describe transmission patterns and study-level associations; they do not establish causality or provide evidence beyond this article.
Structured evidence summary
Research question
The study examined how locally acquired DENV-2 transmission was patterned across Italy during 2024, including spatial spread, generation time, reproduction estimates, and associations with temperature and vector-control measures.
Study design
The authors analyzed 296 locally acquired cases with symptom onset from 31 July through 31 October 2024. They used detailed spatiotemporal information and a Bayesian framework to reconstruct transmission chains and estimate transmission-related measures.
Population and setting
The analysis covered locally acquired DENV-2 cases associated with transmission foci in four Italian regions during 2024, with three major foci examined in the reported results.
Main findings
Peak net reproduction estimates across the three major foci ranged from 1.35 to 3.33, and the mean generation time was estimated at 18.0 days. Most identified transmission events occurred over short distances, with 15.4% attributed to household transmission and fewer than 1% occurring beyond 400 m. Following outbreak detection, the average number of secondary cases fell from 1.4 to 0.4; vector control was associated with a 41.0% reduction in transmission, while transmission increased with higher temperature.
Public-health relevance
Within the study's analysis, the results indicate that early detection and vector-control measures were associated with lower transmission during the reported Italian outbreaks. The findings describe transmission patterns and study-level associations; they do not establish causality or provide evidence beyond this article.
Important limitations
The supplied material does not state specific study limitations. This summary is limited to the supplied single-article abstract and metadata, and the original paper would be required for decision-grade assessment of methods, uncertainty, data completeness, and potential confounding.
GIDS interpretation
The article is discoverable as a peer-reviewed journal report concerning dengue transmission dynamics and outbreak investigation in Italy. Its content provides context for interpreting DENV-2 outbreak transmission in the reported 2024 setting, but it does not confirm or validate any live surveillance signal.
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 9 auditable classifier relationships to diseases, places, topics, and study design.