Chikungunya, Dengue, Zika, and West Nile Virus in Nouvelle-Aquitaine. Bulletin dated October 29, 2026.

Published on 29 October 2026

Key Points

Chikungunya

20 locally transmitted outbreaks of chikungunya have been identified (18 in Gironde, 1 in Landes, and 1 in Pyrénées-Atlantiques), 14 of which are still active.
22 imported cases of chikungunya—either probable or confirmed—have been identified in Nouvelle-Aquitaine (compared to 150 last year as of October 6, 2025).

Dengue

One locally transmitted dengue outbreak has been identified in Dordogne (resolved).
43 imported cases of dengue—probable or confirmed—have been identified in Nouvelle-Aquitaine (compared to 121 last year as of October 6, 2025).

Zika

No imported cases of Zika have been identified in Nouvelle-Aquitaine.

West Nile

12 locally acquired cases have been identified (10 in Gironde and 2 in Deux-Sèvres).

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Chikungunya

thematic dossier

28 October 2026

Chikungunya is a viral disease transmitted by mosquitoes of the genus Aedes. The most common symptoms are fever and joint pain.

Dengue

thematic dossier

28 October 2026

Dengue fever is a viral disease transmitted by mosquitoes of the genus Aedes. The most common symptoms are fever and joint pain. Its complications can be severe.

Zika

thematic dossier

28 October 2026

Zika is a viral disease transmitted primarily by mosquitoes but also through sexual contact. Symptoms are usually mild, but the virus can cause birth defects if a woman becomes infected during...