Key Points 

Two Outbreaks of Local Transmission Detected

• As of August 10, 2026, in Nouvelle-Aquitaine, two outbreaks of local transmission of chikungunya have been identified in Gironde:
  • one outbreak in Saint-Médard-en-Jalles (1 confirmed case);
  • one outbreak in Prignac-et-Marcamps (6 confirmed cases).
• Investigations, as well as management and prevention measures, are ongoing.

Summary of imported cases

• From May 1 to August 9, 2026, 17 imported cases of chikungunya and 26 imported cases of dengue were identified in the region, with no imported cases of Zika.
• The number of imported cases is significantly lower than during the same period last year (135 cases of chikungunya and 92 cases of dengue between May 1 and July 29, 2025).
• Most of these individuals were returning from a trip to France’s overseas territories.