Wisconsin officials cull backyard poultry after avian influenza case
A case of highly pathogenic avian influenza was confirmed in a Rusk County backyard flock, leading state officials to euthanize the birds and issue biosecurity guidance.
The Wisconsin Department of Agriculture, Trade and Consumer Protection confirmed Thursday that a backyard poultry flock in Rusk County tested positive for highly pathogenic avian influenza (HPAI). The agency said all birds on the property were euthanized and will not enter the food supply.
HPAI, an influenza type A virus that can be fatal to domestic birds, has been detected in wild and domestic populations across North America since December 2021, according to the department. Transmission can occur through contact with infected birds, their droppings, or contaminated equipment and clothing.
When HPAI is identified in a backyard flock, officials may establish a 10-kilometer surveillance zone, though movement restrictions are not imposed on nearby poultry operations. The department advised livestock owners to practice biosecurity measures such as hand washing, equipment disinfection, limiting animal access, and isolating new birds for at least 30 days. Keeping poultry indoors when feasible was also recommended.