Highly pathogenic avian influenza (HPAI) continues to spread in the U.S. Midwest, with the presence of the virus being confirmed in 10 more commercial poultry flocks in Ohio and three more in Missouri.
Avian influenza in Ohio
Of the 10 commercial poultry flocks recently affected by HPAI in Ohio, three instances were confirmed on January 31 and seven were confirmed on January 30, according to information from the United States Department of Agriculture (USDA) Animal and Plant Health Inspection Service (APHIS).
The cases confirmed on January 31 include:
- A flock of 11,700 meat turkeys in Darke County
- A flock of 22,000 meat turkeys in Mercer County
- A flock of 748,800 laying hens in Mercer County
The cases confirmed on January 30 include:
- A flock of 150,700 laying hens in Darke County
- A flock of 21,600 meat turkeys in Mercer County
- A flock of 437,100 laying hens in Mercer County
- A flock of 8,700 meat turkeys in Mercer County
- A flock of 4,600 meat turkeys in Mercer County
- A flock of 11,200 meat turkeys in Mercer County
- A flock of 21,400 meat turkeys in Van Wert County.
Ohio has had more commercial flocks affected by HPAI in 2025 than any other state. So far this year, the state has lost 39 flocks.
Avian influenza in Missouri
Four more commercial poultry flocks in Missouri have been affected by HPAI.
On January 31, the presence of HPAI was confirmed in a Barry County turkey flock, involving 34,000 birds, and a McDonald County broiler flock, involving 131,400 birds.
On January 30, the presence of HPAI was confirmed in a flock of 11,700 commercial meat turkeys in McDonald County.
On January 29, the presence of HPAI was confirmed in a flock of 19,000 commercial meat turkeys in Newton County.
So far in 2025, Missouri has lost 14 commercial poultry flocks to HPAI.
Update on Indiana situation
APHIS had previously announced that HPAI was confirmed in a commercial layer operation in Jackson County, Indiana, on January 28. However, an update to the APHIS website revealed that the flock involved more birds than earlier announced.
The Jackson County flock was previously reported as 586,100 birds, but that amount has been changed to 2,633,900.
Avian influenza in Canada
The Canadian Food Inspection Agency (CFIA) reported the confirmed presence of HPAI in a commercial poultry flock in Matawinie Regional County Municipality, Quebec. That confirmation was made on January 30. CFIA did not disclose information concerning what type of birds were involved or how many birds were in the flock.
This is the first time CFIA has reported an instance of HPAI in commercial poultry in Canada since January 11, when the virus was confirmed in two commercial flocks in Abbotsford, British Columbia.
CFIA had earlier reported it was experiencing technical problems with its website where it listed positive HPAI cases in poultry, but that message has since been removed.
View our continuing coverage of the global avian influenza situation.
To learn more about HPAI cases in commercial poultry flocks in the United States, Mexico and Canada, see an interactive map on WATTPoultry.com.
