New cases of highly pathogenic avian influenza (HPAI) have been confirmed in commercial turkey flocks in California and Wisconsin.

The United States Department of Agriculture (USDA) Animal and Plant Health Inspection Service (APHIS) reported that the presence of the virus was confirmed in a flock of 51,000 commercial turkeys in Stanislaus County, California, on October 3. This is the first confirmed HPAI case in Stanislaus County for 2022 and the 11th for California.

The other case was confirmed on September 29 in Dunn County, Wisconsin. That case involved a flock of 79,500 turkeys. This is the first commercial case in Dunn County of 2022, although the virus was confirmed in a backyard flock in the county in May. Ten cases of HPAI have been confirmed in commercial poultry flocks in Wisconsin so far this year.

To learn more about HPAI cases in commercial poultry flocks in the United States and Canada, see an interactive map on


Read our ongoing coverage of the global avian influenza outbreak.

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