The total number of birds in the U.S. affected by the 2022/2023 highly pathogenic avian influenza (HPAI) outbreak officially surpassed 60 million birds this week, according to the United States Department of Agriculture’s (USDA) Animal and Plant Health Inspection Service (APHIS).

The Iowa Department of Agriculture and Land Stewardship (IDALS) and APHIS confirmed Oct. 31 another positive case of HPAI in Buena Vista County, Iowa. The affected site is a commercial turkey flock of 30,000 birds. APHIS also reported a turkey flock of 29,700 birds in Beadle County, South Dakota, had been confirmed with the virus, as well as an upland gamebird operation of 296,500 birds in Chilton County, Alabama.

IDALS said commercial and backyard flock owners should continue to prevent contact between their birds and wild birds. Sick birds or unusual deaths among birds should be immediately reported to state or federal officials.

A highly contagious viral disease, HPAI can travel in wild birds without those birds appearing sick, but is often fatal to domestic bird populations, including chickens and turkeys. The virus can spread through the droppings or the nasal discharge of an infected bird, both of which can contaminate dust and soil.

Signs of HPAI may include:

Additional information is available from APHIS here.