01 May 2026
In February 2026, a highly pathogenic avian influenza (HPAI) A(H5N1) outbreak was identified in a small, remote poultry holding in the Sigmaringen district of Germany. The event involved approximately 21 chickens and nine free-roaming domestic cats. The outbreak was first detected during a veterinary inspection triggered by animal welfare concerns, which revealed sudden deaths among both bird and feline populations.
Laboratory testing confirmed HPAI A(H5N1) infection in four dead chickens and multiple cats that presented with severe neurological, respiratory, and general symptoms. All surviving cats on the premises were found to be seropositive for H5-specific antibodies, indicating a widespread infection across the feline group.
Veterinary investigations found bite marks on poultry carcasses, suggesting that the cats likely contracted the virus through predation or scavenging of infected birds. A coordinated One Health response was initiated, identifying 17 humans with occupational or direct exposure to the infected animals. This group included the poultry owner, veterinary staff, police officers, and animal shelter personnel. Despite the high-risk nature of the exposure, where some individuals initially lacked full personal protective equipment, no human cases of H5N1 were detected. One symptomatic veterinarian tested negative for avian influenza but was found to be infected with human coronavirus.
Dressler A, et al. Highly pathogenic avian influenza A(H5N1) in poultry and domestic cats and occupational exposure among veterinary and other first responders, Germany, February 2026. Euro Surveill. 2026;31(17).
