Country surveillance profile
Mosquito-borne disease in Italy — 2025–2026 data
As of 10 June 2026, Mosticare tracks Italy surveillance for West Nile virus and Chikungunya. Italy recorded the most human West Nile virus cases in the EU/EEA in 2025 — 779 confirmed cases — the largest single-country WNV total in the region that year, concentrated in Lombardia, Veneto and Emilia-Romagna. Each figure cites the responsible national or EU authority.
Last updated · 10 June 2026 · CC BY 4.0
Key facts
Italy recorded the most human West Nile virus cases in the EU/EEA in 2025 — 779 confirmed cases — the largest single-country WNV total in the region that year, concentrated in Lombardia, Veneto and Emilia-Romagna.
Source: Istituto Superiore di Sanità (ISS) · verified 25 May 2026
Italy reported 72 West Nile virus deaths in 2025 — a case fatality rate of 9.2% across 779 confirmed cases — the highest national WNV death toll in the EU/EEA that season.
Source: Istituto Superiore di Sanità (ISS) · verified 25 May 2026
Italy reported 384 autochthonous (locally-acquired) chikungunya cases in 2025 across four regions — Emilia-Romagna, Veneto, Toscana and Lazio — out of 472 total cases including travel-imported ones, with no deaths. All Italian and French CHIKV clusters were declared closed by the end of 2025.
Source: Istituto Superiore di Sanità (ISS) · verified 31 May 2026
The data
| Country / region | Disease | Cases | Deaths | Period | Source | Updated |
|---|---|---|---|---|---|---|
| Italy | West Nile virus | 0 | 0 | 2026 transmission season (year-to-date) | Istituto Superiore di Sanità (ISS) | 10 June 2026 |
| Italy | Chikungunya | 0 | 0 | 2026 transmission season (year-to-date) | Istituto Superiore di Sanità (ISS) | 31 May 2026 |
| Italy | West Nile virus | 779 | 72 | 2025 transmission season | Istituto Superiore di Sanità (ISS) | 25 May 2026 |
| Italy | Chikungunya | 384 | 0 | 2025 transmission season | Istituto Superiore di Sanità (ISS) | 31 May 2026 |
About surveillance in Italy
Italy carries the heaviest West Nile virus burden in the EU/EEA and runs an integrated WNV/Usutu and arbovirus surveillance plan (Piano Nazionale Arbovirosi), coordinated by the Istituto Superiore di Sanità. In 2025 it reported both the most WNV cases and the most WNV deaths in the region.
Frequently asked questions
What mosquito-borne diseases is Italy monitoring in 2026?
Mosticare tracks Italy surveillance for West Nile virus and Chikungunya, each sourced to the responsible national authority or ECDC.
Which European country had the most West Nile virus cases in 2025?
Italy recorded the most human West Nile virus cases in the EU/EEA in 2025 — 779 confirmed cases — the largest single-country WNV total in the region that year, concentrated in Lombardia, Veneto and Emilia-Romagna.
How many people died of West Nile virus in Italy in 2025?
Italy reported 72 West Nile virus deaths in 2025 — a case fatality rate of 9.2% across 779 confirmed cases — the highest national WNV death toll in the EU/EEA that season.
How many autochthonous chikungunya cases did Italy report in 2025?
Italy reported 384 autochthonous (locally-acquired) chikungunya cases in 2025 across four regions — Emilia-Romagna, Veneto, Toscana and Lazio — out of 472 total cases including travel-imported ones, with no deaths. All Italian and French CHIKV clusters were declared closed by the end of 2025.
How many West Nile virus cases did Italy report in 2025?
Italy reported 779 West Nile virus cases and 72 deaths in 2025 (2025 transmission season), per Istituto Superiore di Sanità (ISS).
How many Chikungunya cases did Italy report in 2025?
Italy reported 384 Chikungunya cases in 2025 (2025 transmission season), per Istituto Superiore di Sanità (ISS).
Sources
Explore more
About this data
Mosticare aggregates and re-publishes vector-borne disease surveillance from ECDC, EFSA, and national ministries of health. Mosticare is an aggregator, not a primary surveillance authority — every figure on this page cites the originating source and is independently verifiable. This is a partial aggregation; for the complete EU/EEA totals, ECDC is the primary source.
The data behind this page is published as a free, machine-readable feed under CC BY 4.0: /threat-map/feed.json (JSON Schema). See the live Europe threat map and the full data room.