Key Points

Chikungunya, dengue, Zika

In Occitanie, from May 1 to October 1, 2025, the following were identified:

• 90 imported cases of dengue, 102 imported cases of chikungunya, and 1 imported case of Zika.

• 67 locally acquired cases of chikungunya: 35 in Gard and 32 in Hérault.

• 6 locally acquired cases of dengue: 3 in Haute-Garonne, 1 in Lot, 1 in Pyrénées-Orientales, and 1 in Hérault.

West Nile Virus

In Occitanie, five confirmed human cases of West Nile Virus infection were identified in 2025:

• 4 cases in Hérault in the municipalities of Florensac, Agde, Pomerols, and Castelnau-le-Lez. The onset dates of symptoms ranged from July 18, 2025, to August 25, 2025. Among these cases, one person presented with a neuroinvasive form, and two were identified following screening conducted by the EFS during blood donations.

• One case in Haute-Garonne who developed symptoms on August 27 and was hospitalized for a neuroinvasive form on August 31.