Highly contagious bird flu detected in Wisconsin as officials euthanize infected flock

The Wisconsin Department of Agriculture, Trade and Consumer Protection (DATCP) confirmed on November 13, 2026, that a highly contagious strain of highly pathogenic avian influenza (HPAI) was detected in a backyard poultry flock in Rusk County, Wisconsin. To prevent the spread of the potentially deadly disease, officials ordered that all birds on the property were euthanized and will not enter the food system. While the specific cause of the infection was not disclosed, HPAI has been circulating among wild and domestic birds in North America since December 2021. The virus spreads through contact with infected birds, wild birds or their droppings, and contaminated equipment or clothing. In response to the outbreak, the DATCP urged livestock owners to take precautions such as washing hands, disinfecting equipment, and separating new animals for at least 30 days. Although the agency may establish a 10-kilometer surveillance zone when such cases are confirmed, surrounding poultry premises are not currently subject to mandatory measures.