WOAH reported highly pathogenic avian influenza (HPAI) H5N4 at a backyard producer premises in Teton County, Montana. The detected Eurasian lineage goose/Guangdong clade 2.3.4.4b is highly pathogenic for poultry. This is the first confirmed case of HPAI H5N4 in poultry in the United States.

WOAH reported highly pathogenic avian influenza (HPAI) H5N4 at a backyard producer premises in Teton County, Montana. The detected Eurasian lineage goose/Guangdong clade 2.3.4.4b is highly pathogenic for poultry. This is the first confirmed case of HPAI H5N4 in poultry in the United States.