Livestock at multiple dairy farms across the U.S. have tested positive for bird flu — also known as highly pathogenic avian influenza, or HPAI — in an outbreak that's likely spread to at least five states.
The U.S. Department of Agriculture's Animal and Plant Health Inspection Service confirmed Friday that cows in Texas, Kansas and Michigan had been sickened by the virus, and there were presumptive positive test results for additional herds in New Mexico and Idaho.
