DES MOINES, Iowa (AP) – Iowa agriculture officials say three additional Iowa poultry farms show signs of the presence of bird flu including two more turkey farms in Buena Vista County, raising the number in the county to 10. A Sioux County egg-laying operation with 60,000 chickens also appears to have the virus. Testing is underway to confirm the disease. The farms experienced an unusual number of bird deaths, prompting an initial test which indicated presence of the H5N2 virus.

The new cases raise Iowa’s total number to 28 cases in 11 counties. More than 20 million of Iowa’s chickens will be affected if the latest cases are confirmed. The number of turkeys to be lost is approaching 500,000.