The U.S. Department of Agriculture has detected a bird flu strain in dairy cattle that previously had not been seen in cows, the agency's Animal and Plant Health Inspection Service said on Wednesday.

A second strain of bird flu has been detected in U.S. dairy cattle, marking the first confirmed infections of this particular virus in cows, the U.S. Department of Agriculture said.

Dairy cattle in Nevada have been infected with a new type of bird flu that's different from the version that has spread in herds since last year. U.S.