Country surveillance profile
Mosquito-borne disease in Ireland — 2025–2026 data
As of 17 June 2026, Mosticare tracks Ireland surveillance for West Nile virus. No autochthonous human cases are reported year-to-date in 2026. Each figure cites the responsible national or EU authority.
Last updated · 17 June 2026 · CC BY 4.0
The data
| Country / region | Disease | Cases | Deaths | Period | Source | Updated |
|---|---|---|---|---|---|---|
| Ireland | West Nile virus | 0 | 0 | 2025 transmission season | European Centre for Disease Prevention and Control (ECDC) — 2025 end-of-season West Nile virus surveillance (data to 3 December 2025) | 17 June 2026 |
About surveillance in Ireland
Ireland reported zero locally acquired human West Nile virus cases in 2025. The European Centre for Disease Prevention and Control (ECDC) lists 14 European countries with autochthonous human WNV cases as of 10 December 2025, and Ireland is not among them — an ECDC-published true negative. The invasive mosquitoes Aedes albopictus and Aedes aegypti are absent from Ireland; the relevant native vector is Culex pipiens. National surveillance is run by Ireland's Health Protection Surveillance Centre (HPSC, HSE).
Frequently asked questions
What mosquito-borne diseases is Ireland monitoring in 2026?
Mosticare tracks Ireland surveillance for West Nile virus, each sourced to the responsible national authority or ECDC.
Were there any West Nile virus cases in Ireland in 2025?
No locally acquired (autochthonous) human cases. Ireland does not appear in the ECDC list of 14 European countries that reported autochthonous human WNV cases in the 2025 season (as of 10 December 2025), so its 2025 count is recorded as 0.
Is the Asian tiger mosquito (Aedes albopictus) established in Ireland?
No. Ireland is not listed by the ECDC as having established or introduced Aedes albopictus populations (June 2025 distribution and the ECDC factsheet). The species is absent across Ireland, Iceland and the Nordic/Baltic region.
Which mosquito matters most for disease surveillance in Ireland?
Culex pipiens, the common house mosquito, is Ireland's dominant native species and the genus relevant to any potential West Nile virus transmission in temperate Europe. Ireland's cool, wet climate currently does not support the invasive Aedes vectors linked to dengue and chikungunya.
Who tracks mosquito-borne disease in Ireland?
The Health Protection Surveillance Centre (HPSC), part of Ireland's Health Service Executive (HSE), is the national surveillance authority and the ECDC competent body. West Nile virus is a notifiable disease in Ireland.
Sources
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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 free, machine-readable feeds under CC BY 4.0 — the point-in-time incidence snapshot at /threat-map/feed.json (JSON Schema) and the multi-year trends at /threat-map/feed/trends.json (JSON Schema). See the live Europe threat map and the full data room.