Key Points

Several Outbreaks of Local Transmission Detected

• As of August 25, 2026, five outbreaks of local transmission have been identified in Nouvelle-Aquitaine, totaling 24 cases of chikungunya and 1 case of dengue. Investigations, management, and prevention measures are ongoing.
• Four local outbreaks of chikungunya identified in Gironde: Saint-Médard-en-Jalles (1 case identified), Prignac-et-Marcamps (20 cases), Talence (2 cases, outbreak linked to that in Prignac-et-Marcamps), and Cavignac (1 case, outbreak linked to that in Prignac-et-Marcamps);
• One locally transmitted dengue outbreak identified in Dordogne: Mouleydier (1 case identified).

Summary of Imported Cases

• From May 1 to August 25, 2026, 18 imported cases of chikungunya and 33 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 (144 cases of chikungunya and 106 cases of dengue between May 1 and August 26, 2025).
• Most of these individuals were returning from a trip to France’s overseas territories.