Health officials say risk to general public remains low as dairy cattle illness spreads to six states.

Detection of highly pathogenic avian influenza (HPAI) in dairy cattle expanded last week to include cows in Ohio, Texas, Kansas, Michigan, New Mexico and Idaho. 

Contact tracing indicates that the sick cows in Ohio, Michigan and Idaho all came from Texas, which now appears to be the epicenter of the outbreak. In response, state and federal animal health officials are stepping up monitoring and surveillance efforts, including new permit requirements for dairy cattle entering some states. 

Symptoms of...