A new case of bird flu has been detected in the Algarve borough of Olhão, raising Portugal’s total number of outbreaks in 2025 to 20, according to the national food and veterinary affairs board (DGAV).
The latest case was detected on Monday, August 18 in Quelfes, Olhão, in a wild duck species known as the gadwall. Just last week, bird flu had also been identified in wild birds in Gafanha de Encarnação and Gafanha da Nazaré, in the Aveiro district. Earlier in August, outbreaks were also confirmed in Alcácer do Sal and Costa da Caparica.
DGAV has warned of the “persistent circulation” of avian influenza and continues to urge strict compliance with biosecurity measures. Farmers and bird owners are advised to prevent contact between domestic and wild birds and to reinforce hygiene procedures in facilities, equipment, and materials.
While transmission of the virus to humans is rare, health officials note that when it does occur, it can cause severe illness.
