The presence of highly pathogenic avian influenza (HPAI) was confirmed in commercial table egg laying operation in Sonoma County, California.
According to the United States Department of Agriculture (USDA) Animal and Plant Health Inspection Service (APHIS), the presence of the virus was confirmed on December 18.
The flock included 497,700 hens.
This is the fifth commercial poultry operation to be affected by HPAI in 2023, and three of those involved commercial layer operations. The other cases involved a meat duck operation and a duck breeder farm.
The county did not have any confirmed HPAI cases in 2022.
So far during the 2022-23 HPAI outbreak, 30 commercial flocks in California have been affected by HPAI. More than 4.1 million birds have been lost in the state.
South Dakota loses commercial upland gamebird flock
APHIS also on December 18 confirmed the presence of HPAI in a commercial upland gamebird flock in Edmunds County, South Dakota.
That flock included 1,200 birds.
According to APHIS, this is the 94th commercial flock in South Dakota to have been affected by HPAI during the 2022-23 outbreak, and the 10th flock in Edmunds County. The state has lost more than 5.3 million birds during that two-year time span.
With the exception of Minnesota, South Dakota has lost more commercial flocks to HPAI than any other state.
To learn more about HPAI cases in commercial poultry flocks in the United States, Mexico and Canada, see an interactive map on WATTPoultry.com.
View our continuing coverage of the global avian influenza situation.
