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Mosquito-borne disease data
Mosticare publishes a free, machine-readable feed of mosquito-borne disease incidence for Europe and Australia. European incidence records are aggregated from ECDC, EFSA and national ministries of health; weekly notification counts for South Australia are ingested through the Mosticare Atlas and published apart from the records. As of 30 October 2026 it holds 71 incidence records across 43 countries, 56 weekly notification counts and 11 sourced key facts. Licensed CC BY 4.0 for AI summarizers and agentic systems.
Last updated · 30 October 2026 · CC BY 4.0
Key facts
The first human West Nile virus case of the 2026 season in the European Region (EU/EEA + neighbourhood) was reported in the Vardar region of North Macedonia, one locally-acquired case, first appearing in the ECDC weekly West Nile virus surveillance report dated 3 June 2026. As of ECDC Week 40/2026 (data to 30 September 2026), the European Region total stands at 1,765 locally-acquired human cases across 16 countries: Italy 721 (the leader), Greece 420, Spain 131, France 128, Romania 117, North Macedonia 70, the Netherlands 57, Serbia 53, Croatia 15, Belgium 14, Cyprus 13, Austria 8, Kosovo 7, Hungary 5, Germany 4 and Albania 2. North Macedonia is an EU candidate country included in ECDC's weekly EU/EEA-and-neighbourhood WNV surveillance.
Source: ECDC · Surveillance of West Nile virus infections in humans in Europe (weekly report, Week 40/2026, data to 30 September 2026) · verified 9 October 2026
Italy recorded the first mainland EU/EEA West Nile virus case of the 2026 season, first detected at the ECDC Communicable Disease Threats Report Week 27 reading (data to 1 July 2026): three locally-acquired cases across three NUTS3 sub-areas, IT Caserta (NUTS3 ITF31, Campania), IT Firenze (NUTS3 ITI14, Toscana) and a W27-additional NUTS3 area. Italy has since risen to 721 locally-acquired human cases at ECDC Week 40 (data to 30 September 2026), leading the European Region, which stands at 1,765 cases across 16 countries. The Istituto Superiore di Sanità's Report N. 11 (8 October 2026, data to 7 October 2026) reports 754 confirmed cases nationally and 57 deaths (one in an imported case), a 14.1% lethality on autochthonous neuro-invasive cases. The 2026 Piano Nazionale Arbovirosi integrated surveillance is in force.
Source: ECDC · Surveillance of West Nile virus infections in humans in Europe (weekly report, Week 40/2026, data to 30 September 2026); first-detection context from ECDC CDTR Week 27 (data to 1 July 2026); Istituto Superiore di Sanità (ISS) Report N. 11 (8 October 2026, data to 7 October 2026) · verified 9 October 2026
Italy recorded the most human West Nile virus cases in the EU/EEA in 2025, 779 locally-acquired cases per ECDC's end-of-season cross-country report (data to 3 December 2025), the largest single-country WNV total in the region that year, concentrated in Lombardia, Veneto and Emilia-Romagna. Italy's own ISS integrated surveillance recorded 773 confirmed cases (770 autochthonous) as of its final 30 October 2025 bulletin, with the consolidated 2025 summary still pending.
Source: ECDC · Surveillance of West Nile virus infections in Europe (cross-country, data to 3 Dec 2025); Istituto Superiore di Sanità (ISS) for national detail · verified 15 June 2026
Greece had the second-most human West Nile virus cases in the EU/EEA in 2025, 96 locally-acquired cases (76 of them neuro-invasive) and 9 deaths, behind only Italy (779). Attica was the main hotspot. The figures are EODY/NPHO's final 2025 count, consistent with ECDC's cross-country report.
Source: EODY · National Public Health Organization (NPHO), Greece · verified 14 June 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
France had the largest autochthonous chikungunya outbreak in continental Europe in 2025, 809 locally-acquired cases across 79 transmission episodes (1 May, 30 November), with symptom onset between 27 May and 13 November. It was the largest continental-European autochthonous CHIKV outbreak on record for that year.
Source: Santé publique France · enhanced arbovirus surveillance · 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
Romania reported its first 2026 autochthonous West Nile virus cases in the ECDC Week 27 reading (data to 1 July 2026) and has since risen to 117 locally-acquired cases at the ECDC Week 40 reading (data to 30 September 2026). Romania does not lead the European count: Italy leads with 721 cases, ahead of Greece (420), Spain (131) and France (128), within a European Region total of 1,765 locally-acquired human cases across 16 countries. Romania was a new 2026 reporting country (0 cases through W26, 2 from W27); the ECDC weekly directs readers to the joint monthly report at https://wnv-monthly.ecdc.europa.eu/ for the county/NUTS3 breakdown. The INSP/CNSCBT national informer could not be fetched in this run (HTTP 503), so no 2026 Romanian death count is given.
Source: ECDC · Surveillance of West Nile virus infections in humans in Europe (weekly report, Week 40/2026, data to 30 September 2026) · verified 9 October 2026
French Guiana (ISO-3166-1 alpha-2 GF, French overseas territory in South America) is reporting the largest active chikungunya cluster in French overseas territories in 2026, with 1,222 cumulative biologically-confirmed cases through Santé publique France Direction régionale Guyane's semaine 29 bulletin (published 23 July 2026), the S29 weekly count 20 (données non consolidées). The S29 bulletin states no new cumulative hospitalisation or death total; the last-stated figures are 201 hospitalisations across the three CHU de Guyane sites (majority classic form, with 21 unusual forms and 8 severe forms) and 1 death classified by SpF as unrelated to chikungunya, both from the semaine 27 bulletin. Under the ORSEC arboviroses plan the Littoral Ouest and Savanes remain the most active foyers, the Île de Cayenne has nine foyers under surveillance and the Maroni is in sporadic transmission. The cluster is the largest sustained autochthonous chikungunya transmission reported from an EU-outermost-region in 2026 and the most material French-overseas escalation point in the 2026 chikungunya arc. Vector: Aedes aegypti (yellow-fever mosquito) is the dominant GF chikungunya vector (Aedes albopictus is also established in GF but is not the principal outbreak vector here). The cluster is intentionally NOT folded into the metropolitan FR/CHIKV 2026 row (which covers metropolitan France only), French Guiana is tracked as a separate FR-GF record rather than an extension of the FR national row, preserving the metropolitan vs overseas scope separation that SpF's separate-bulletin practice operationalises.
Source: Santé publique France, Direction régionale Guyane (SpF-Guyane weekly Bulletin régional Guyane: Surveillance épidémiologique du chikungunya, semaine 29, published 23 Jul 2026) · verified 9 October 2026
The first 2026 autochthonous (locally acquired) human West Nile virus case in metropolitan France was reported in the Pyrénées-Orientales département (Occitanie). Santé publique France's national reinforced arbovirus bulletin of 23 July 2026 (data to 20 July 2026) recorded the first case of the metropolitan-France 2026 season. By ECDC Week 40 (data to 30 September 2026) France stands at 128 locally-acquired human WNV cases, within the European Region total of 1,765 cases across 16 countries; Santé publique France's national reinforced bulletin et-25 (30 September 2026, data to 28 September 2026) puts metropolitan France at 145 autochthonous cases across seven régions. WNV is transmitted by Culex mosquitoes; most human infections are silent, and there is no licensed human vaccine or specific antiviral, so avoiding bites is the primary individual defence.
The first 2026 autochthonous (locally acquired) dengue in metropolitan France was detected in Occitanie, 2 cases, one in the Tarn and one in l'Hérault. Santé publique France's national reinforced arbovirus bulletin of 23 July 2026 (data to 20 July 2026) recorded them as the first metropolitan-France autochthonous dengue of the year. By its et-25 bulletin (30 September 2026, data to 28 September 2026) metropolitan France stands at 6 autochthonous dengue cases across four transmission episodes, in the Tarn and l'Hérault (Occitanie), the Dordogne (Nouvelle-Aquitaine) and the Bouches-du-Rhône (Provence-Alpes-Côte d'Azur); 424 imported dengue cases were recorded for 1 May to 27 September 2026, the travel-associated reservoir that can seed local transmission. Transmission is by the Aedes albopictus tiger mosquito, established across much of southern and central metropolitan France. Dengue mosquitoes bite mainly by day, so personal protection and physical barriers are the primary individual defence.
Source: Santé publique France · national reinforced arbovirus bulletin (chikungunya-dengue-Zika et-25, 30 September 2026, data to 28 September 2026) · verified 9 October 2026
European records
South Australia notifications
| Week ending | Barmah Forest virus | Chikungunya | Dengue | Japanese encephalitis | Malaria | Murray Valley encephalitis | Ross River virus |
|---|---|---|---|---|---|---|---|
| 5 September 2026 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
| 12 September 2026 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 19 September 2026 | 0 | 0 | 1 | 0 | 0 | 0 | 1 |
| 26 September 2026 | 0 | 0 | 2 | 0 | 0 | 0 | 0 |
| 3 October 2026 | 0 | 0 | 1 | 0 | 1 | 0 | 1 |
| 10 October 2026 | 0 | 0 | 1 | 0 | 1 | 0 | 3 |
| 17 October 2026 | 0 | 0 | 2 | 0 | 1 | 0 | 2 |
| 24 October 2026 | 1 | 0 | 2 | 0 | 0 | 0 | 2 |
| 8 weeks | 1 | 1 | 9 | 0 | 3 | 0 | 9 |
Browse by disease & country
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Sources
- Santé publique France, bilan national West Nile 2025 (édition nationale, deaths); ECDC for the cross-country case count (data to 3 Dec 2025)
- Istituto Superiore di Sanità (ISS), deaths + integrated WNV/Usutu surveillance; ECDC for the cross-country case count (data to 3 Dec 2025)
- Istituto Superiore di Sanità (ISS)
- Junta de Andalucía · Consejería de Salud y Consumo
- Direção-Geral da Saúde (DGS) · REVIVE programme
- IASaúde · Instituto de Administração da Saúde da Madeira
- RENAVE · Centro Nacional de Epidemiología (ISCIII), final 2025 national report (deaths); ECDC for the cross-country case count (data to 3 Dec 2025)
- Santé publique France, bilan national chikungunya/dengue/Zika 2025 (édition nationale, enhanced arbovirus surveillance)
- EODY · National Public Health Organization (NPHO), Greece
- Institut za javno zdravlje Srbije „Dr Milan Jovanović Batut“
- Institutul Național de Sănătate Publică (INSP) · CNSCBT
- Nemzeti Népegészségügyi és Gyógyszerészeti Központ (NNGYK)
- ECDC · Surveillance of West Nile virus infections in Europe (monthly report, data to 3 December 2025)
- ECDC · Surveillance of West Nile virus infections in humans in Europe (weekly report, Week 44/2026, data to 28 October 2026)
- Istituto Superiore di Sanità arbovirosi bulletin (27 October 2026)
- Junta de Andalucía · Consejería de Sanidad, Presidencia y Emergencias
- Santé publique France chikungunya/dengue bulletin (published 28 October 2026, data to 26 October 2026)
- Santé publique France, Direction régionale Guyane (SpF-Guyane weekly Bulletin régional Guyane: Surveillance épidémiologique du chikungunya, semaine 29, published 23 Jul 2026)
- ECDC · Surveillance of West Nile virus infections in humans in Europe (weekly report, Week 44/2026, data to 28 October 2026)
- European Centre for Disease Prevention and Control (ECDC), 2025 end-of-season West Nile virus surveillance (data to 3 December 2025)
- Public Health Center of the Ministry of Health of Ukraine; Deputy Minister of Health & Chief Sanitary Doctor Ihor Kuzin
- National Center for Disease Control and Prevention (NCDC) / Ministry of Health of Armenia, reported via ARMENPRESS
- Samoilova TI, Votiakov VI, Titov LP, Central European Journal of Public Health (2003)
- European Centre for Disease Prevention and Control (ECDC)
- European Centre for Disease Prevention and Control (ECDC)
- Rospotrebnadzor (Federal Service for Surveillance on Consumer Rights Protection and Human Wellbeing), surveillance review, Putintseva et al., 2025
- Hubálek & Halouzka, Emerging Infectious Diseases (US CDC), 1999, WNV reported from Azerbaijan; no national autochthonous case count is published
- National Center for Disease Control and Public Health of Georgia (NCDC)
- SA Health, Communicable Disease Control Branch
- SA Health, Weekly Report - Last 8 Weeks (notifiable conditions, South Australia)Source: SA Health, Weekly Report - Last 8 Weeks, CC BY 4.0. Extracted and reformatted by Mosticare. CC BY 4.0
- NSW Arbovirus Surveillance and Mosquito Monitoring Program, arbovirus data (Data.NSW)© State of New South Wales NSW Ministry of Health. For current information go to www.health.nsw.gov.au. Arbovirus data, Data.NSW, CC BY 3.0 AU. Reformatted by Mosticare. CC BY 3.0 AU
- GBIF occurrence records, mosquitoes (Culicidae) in Australia, CC0 1.0 and CC BY 4.0 onlyGBIF.org occurrence data. Dataset publishers are credited per dataset. CC0 1.0 and CC BY 4.0
32 GBIF datasets
- Walter Reed Biosystematics Unit, Smithsonian Institution. Mosquito Occurrence Dataset. Occurrence dataset https://doi.org/10.15468/tw2y9b accessed via GBIF.org on 2026-10-27. CC BY 4.0, 8,959 records
- Queensland Museum (2026). Queensland Museum provider for OZCAM. Occurrence dataset https://doi.org/10.15468/lotsye accessed via GBIF.org on 2026-10-27. CC BY 4.0, 6,897 records
- Commonwealth Scientific and Industrial Research Organisation (2026). Australian National Insect Collection. Occurrence dataset https://doi.org/10.15468/s1hm8r accessed via GBIF.org on 2026-10-27. CC BY 4.0, 2,299 records
- Museums Victoria (2026). Museums Victoria provider for OZCAM. Occurrence dataset https://doi.org/10.15468/lp1ctu accessed via GBIF.org on 2026-10-27. CC0 1.0, 1,423 records
- European Bioinformatics Institute (EMBL-EBI), GBIF Helpdesk (2026). INSDC Sequences. Version 1.190. European Nucleotide Archive (EMBL-EBI). Occurrence dataset https://doi.org/10.15468/sbmztx accessed via GBIF.org on 2026-10-27. CC BY 4.0, 1,073 records
- iNaturalist contributors, iNaturalist (2026). iNaturalist Research-grade Observations. iNaturalist.org. Occurrence dataset https://doi.org/10.15468/ab3s5x accessed via GBIF.org on 2026-10-27. CC BY 4.0, CC0 1.0, 980 records
- The International Barcode of Life Consortium (2026). International Barcode of Life project (iBOL). Occurrence dataset https://doi.org/10.15468/inygc6 accessed via GBIF.org on 2026-10-27. CC BY 4.0, 662 records
- NSW Department of planning, industry and environment (2026). NSW BioNet Atlas. Occurrence dataset https://doi.org/10.15468/14jd9g accessed via GBIF.org on 2026-10-27. CC BY 4.0, 383 records
- Atlas of Living Australia (2026). Dandjoo. Occurrence dataset https://doi.org/10.15468/4vq6up accessed via GBIF.org on 2026-10-27. CC BY 4.0, 361 records
- Australian Museum (2026). Australian Museum provider for OZCAM. Occurrence dataset https://doi.org/10.15468/e7susi accessed via GBIF.org on 2026-10-27. CC BY 4.0, 305 records
- Kraemer M U G, Sinka M E, Duda K A, Mylne A, Shearer F M, Brady O J, Messina J P, Barker C M, Moore C G, Carvalho R G, Coelho G E, Van Bortel W, Hendrickx G, Schaffner F, Wint G R W, Elyazar I R F, Teng H, Hay S I, Page R D M. Global compendium of Aedes aegypti occurrence. Institute of Biodiversity, Animal Health and Comparative Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow. Occurrence dataset https://doi.org/10.15468/bgmqmr accessed via GBIF.org on 2026-10-27. CC0 1.0, 290 records
- European Molecular Biology Laboratory Australia (2019). European Molecular Biology Laboratory Australian Mirror. Occurrence dataset https://doi.org/10.15468/ypsvix accessed via GBIF.org on 2026-10-27. CC BY 4.0, 212 records
- Victorian Department of Energy, Environment and Climate Action (2026). Victorian Biodiversity Atlas. Occurrence dataset https://doi.org/10.15468/khlfs3 accessed via GBIF.org on 2026-10-27. CC BY 4.0, 89 records
- Ciliberti P, Creuwels J (2026). Naturalis Biodiversity Center (NL) - Diptera. Naturalis Biodiversity Center. Occurrence dataset https://doi.org/10.15468/cl6p3l accessed via GBIF.org on 2026-10-27. CC0 1.0, 40 records
- NatureMap (2019). Carnarvon Basin Wetland Invertebrate Survey. Occurrence dataset https://doi.org/10.15468/gpgvgr accessed via GBIF.org on 2026-10-27. CC BY 4.0, 38 records
- NatureMap (2019). Carnarvon Basin (Aquatic Projects) - Invertebrates. Occurrence dataset https://doi.org/10.15468/6vptrw accessed via GBIF.org on 2026-10-27. CC BY 4.0, 38 records
- NSW Department of Primary Industries (2026). NSW DPI Biosecurity Collections. Occurrence dataset https://doi.org/10.15468/7k7b25 accessed via GBIF.org on 2026-10-27. CC BY 4.0, 30 records
- Data Management A (2026). ALA species sightings and OzAtlas. Atlas of Living Australia. Occurrence dataset https://doi.org/10.15468/jayxmn accessed via GBIF.org on 2026-10-27. CC BY 4.0, 26 records
- NatureMapr (2026). NatureMapr. Occurrence dataset https://doi.org/10.15468/uye32x accessed via GBIF.org on 2026-10-27. CC BY 4.0, 24 records
- Murray-Darling Basin Authority (2019). MDFRC macroinvertebrate survey. Occurrence dataset https://doi.org/10.15468/paioao accessed via GBIF.org on 2026-10-27. CC BY 4.0, 8 records
- Kraemer M U G, Sinka M E, Duda K A, Mylne A, Shearer F M, Brady O J, Messina J P, Barker C M, Moore C G, Carvalho R G, Coelho G E, Van Bortel W, Hendrickx G, Schaffner F, Wint G R W, Elyazar I R F, Teng H, Hay S I, Page R D M. Global compendium of Aedes albopictus occurrence. Institute of Biodiversity, Animal Health and Comparative Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow. Occurrence dataset https://doi.org/10.15468/7apj8n accessed via GBIF.org on 2026-10-27. CC0 1.0, 5 records
- Kelly T, Cooyou E, Murphy A, Cooyou J, Lewis Y, Barnes P, Andrews J, Brown J, Gudge S, Suominen S, Provoost P, Gillard E, Douvere F, Appeltans W (2026). UNESCO eDNA expedition in Ningaloo Coast (Australia): May 2023. Version 2.1. OBIS Secretariat. Occurrence dataset https://doi.org/10.25607/290ncx accessed via GBIF.org on 2026-10-27. CC0 1.0, 5 records
- Tasmanian Museum and Art Gallery (2026). Tasmanian Museum and Art Gallery provider for OZCAM. Occurrence dataset https://doi.org/10.15468/ijp8p9 accessed via GBIF.org on 2026-10-27. CC BY 4.0, 4 records
- Atlas of Living Australia (2024). Kangaroo Island Insect Collection. Occurrence dataset https://doi.org/10.15468/rhwnkz accessed via GBIF.org on 2026-10-27. CC BY 4.0, 3 records
- Grinter C, Fong J (2026). CAS Entomology (ENT). Version 6.389. California Academy of Sciences. Occurrence dataset https://doi.org/10.15468/3ibpmo accessed via GBIF.org on 2026-10-27. CC0 1.0, 2 records
- Wild A (2026). University of Texas, Biodiversity Center, Entomology Collection (UTIC). Version 1.338. University of Texas at Austin, Biodiversity Collections. Occurrence dataset https://doi.org/10.15468/sanyq7 accessed via GBIF.org on 2026-10-27. CC0 1.0, 2 records
- South Australian Museum (2025). South Australian Museum Adelaide provider for OZCAM. Occurrence dataset https://doi.org/10.15468/wz4rrh accessed via GBIF.org on 2026-10-27. CC BY 4.0, 2 records
- North Sydney Council (2026). Wildlife Watch NSC. Occurrence dataset https://doi.org/10.15468/4x6bze accessed via GBIF.org on 2026-10-27. CC BY 4.0, 1 record
- Hubley B (2024). Royal Ontario Museum - Entomology Collection. Version 2.0. Royal Ontario Museum. Occurrence dataset https://doi.org/10.5886/p69k4g accessed via GBIF.org on 2026-10-27. CC BY 4.0, 1 record
- Western Australian Museum (2024). Western Australian Museum provider for OZCAM. Occurrence dataset https://doi.org/10.15468/5qt0dm accessed via GBIF.org on 2026-10-27. CC BY 4.0, 1 record
- Orrell T, Informatics and Data Science Center - Digital Stewardship (2026). NMNH Extant Specimen Records (USNM, US). Version 1.113. National Museum of Natural History, Smithsonian Institution. Occurrence dataset https://doi.org/10.15468/hnhrg3 accessed via GBIF.org on 2026-10-27. CC0 1.0, 1 record
- Gilligan J, Wood C, DiBattista J, Jain F, Suominen S, Provoost P, Gillard E, Douvere F, Appeltans W (2026). UNESCO eDNA expedition in Lord Howe Island Group (Australia): January 2023. Version 1.1. OBIS Secretariat. Occurrence dataset https://doi.org/10.15468/mpevs2 accessed via GBIF.org on 2026-10-27. CC0 1.0, 1 record
- Natural Earth 1:50m admin-1 states and provinces (Australia)Made with Natural Earth. Public domain
About this data
Mosticare aggregates and re-publishes vector-borne disease surveillance from ECDC, EFSA, national and state ministries of health, and GBIF. 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 Global Mosquito Threat Map and the full data room.