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

A highly contagious strain of bird flu has struck a backyard poultry flock in Wisconsin, prompting officials to euthanize the birds amid ongoing concerns about the spread of the potentially deadly disease.

The Wisconsin Department of Agriculture, Trade and Consumer Protection (DATCP) confirmed Thursday a case of highly pathogenic avian influenza (HPAI) in a backyard poultry flock in Rusk County.

Officials did not specify how the flock became infected.

DATCP said all birds on the property were euthanized and will not enter the food system.

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HPAI, a highly contagious virus that is often fatal to domestic poultry, has circulated among wild and domestic birds in North America since December 2021, according to DATCP.

The disease is caused by influenza type A viruses and can vary in severity depending on the strain and affected species.

The virus can spread through contact with infected birds, wild birds or their droppings, as well as contaminated equipment or clothing worn by people working with the animals, according to DATCP.

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When HPAI is confirmed in a backyard poultry flock, officials may establish a 10-kilometer surveillance zone, though surrounding poultry premises would not face movement restrictions.

DATCP urged livestock owners to take precautions to protect their flocks and herds, including washing hands, disinfecting equipment, restricting access to animals and separating new additions for at least 30 days.

The agency also recommended that poultry owners keep their birds indoors when possible.