The most recently confirmed case of highly pathogenic avian influenza (HPAI) in the United States occurred in a commercial turkey flock in Barron County, Wisconsin.

The affected flock involved 110,700 turkeys, according to the United States Department of Agriculture (USDA) Animal and Plant Health Inspection Service (APHIS).

This is the second commercial poultry flock in Barron County where HPAI has been detected. The first case was confirmed on April 12 and involved 46,500 turkeys. The county also had a confirmed case of HPAI in a backyard flock of 150 birds.

 There have been two other cases of HPAI in commercial poultry in Wisconsin in 2022. The other cases involved a flock of commercial laying hens in Jefferson County, and a commercial turkey flock in Polk County. Nearly 3 million birds in the state have been affected by the virus.

In addition to Wisconsin, HPAI has been confirmed in the following states: Oklahoma, Minnesota, North Dakota, South Dakota, Nebraska, Kansas, Iowa, Missouri, Kentucky, Indiana, Colorado, North Carolina, Delaware, Maryland, Pennsylvania and Utah. The virus has also been found in commercial game bird operations in Texas, New York and South Dakota.

Three new avian flu cases in Canada

The Canadian Food Inspection Agency (CFIA) reported three new cases of HPAI in commercial poultry flocks in two provinces. 


These cases have been confirmed in Waterloo, Ontario; Wainright, Alberta; and Lethbridge County, Alberta.

CFIA has not disclosed information about the types of flocks affected or how many birds were in those flocks.

To date, every Canadian province has had a confirmed case of HPAI. However, not all of those cases have involved commercial poultry.

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.