 The U.S. Department of Agriculture says highly pathogenic avian influenza has been discovered in two Minnesota commercial turkey flocks. The agency says one case in Renville County affected over 15,000 breeder hens. The cases in Kandiyohi County affect nearly 22,000 hens and about 4,300 toms. H5N1 is a virus that can infect birds, mammals, and domestic poultry.