INDIANAPOLIS — The Indiana State Board of Animal Health reported the first positive case of highly pathogenic avian influenza (HPAI) in a commercial flock in Indiana since May 2023.

The outbreak occurred in a commercial turkey flock in Daviess County, Ind., where 13,071 birds are currently under quarantine.

A 10 km control area has been established around the flock, affecting 45 commercial flocks and 48 backyard flocks. Additionally, a 20 km surveillance zone is in place in portions of Daviess, Martin and Greene counties, which encompasses 56 commercial flocks.

Since the beginning of the HPAI wave in February 2022, Indiana has reported 11 outbreaks in commercial poultry flocks and six in backyard flocks across seven counties.

The Indiana State Board of Animal Health described the HPAI wave as “the United States’ largest animal health emergency in history,” as it has affected over 1,000 premises in 47 states.

In the past 30 days, the disease has been identified in 20 commercial flocks and 14 backyard flocks, affecting a total of 4.51 million birds, according to data from the US Department of Agriculture’s Animal and Plant Health Inspection Service (APHIS).