Country surveillance profile
Mosquito-borne disease in Slovenia — 2025–2026 data
As of 17 June 2026, Mosticare tracks Slovenia 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 |
|---|---|---|---|---|---|---|
| Slovenia | 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 Slovenia
For the 2025 transmission season, the European Centre for Disease Prevention and Control (ECDC) reported no autochthonous human West Nile virus cases in Slovenia — the country is absent from ECDC's list of states with human cases. WNV is carried by native Culex mosquitoes. The invasive tiger mosquito (Aedes albopictus) is established in Slovenia per ECDC VectorNet (June 2025), while Aedes aegypti remains absent. Slovenia's national authority is NIJZ.
Frequently asked questions
What mosquito-borne diseases is Slovenia monitoring in 2026?
Mosticare tracks Slovenia surveillance for West Nile virus, each sourced to the responsible national authority or ECDC.
Were there any West Nile virus cases in Slovenia in 2025?
No. According to ECDC's 2025 seasonal surveillance, Slovenia did not report any locally acquired (autochthonous) human West Nile virus cases. Slovenia is absent from ECDC's list of countries that reported human cases in 2025, which means a reported count of zero.
Does West Nile virus circulate in Slovenia at all?
Yes, historically. Slovenia's first confirmed human case was identified in 2013, and three West Nile neuroinvasive disease cases were confirmed in 2018. The virus is carried by native Culex mosquitoes. However, no human cases were reported in the 2025 season.
Is the tiger mosquito present in Slovenia?
Yes. The invasive Asian tiger mosquito (Aedes albopictus) is established in Slovenia according to the ECDC/EFSA VectorNet distribution map (June 2025). Slovenia's National Institute of Public Health (NIJZ) notes the tiger mosquito does not transmit West Nile virus but can carry certain tropical diseases — though no such local transmission is currently recorded in Slovenia.
Was there any local dengue or chikungunya in Slovenia in 2025?
No autochthonous dengue or chikungunya was reported for Slovenia in 2025. NIJZ states that, apart from West Nile fever spread by native Culex mosquitoes, there are currently no other mosquito-borne diseases circulating in Slovenia.
Who tracks mosquito-borne disease in Slovenia?
Slovenia's national public-health authority is the Nacionalni inštitut za javno zdravje (NIJZ — National Institute of Public Health), working with the Institute of Microbiology and Immunology at the University of Ljubljana. EU-level surveillance is coordinated by ECDC. Mosticare is an independent civil-society aggregator that republishes these authorities' figures; it does not collect surveillance data itself.
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.