The finding indicates that the virus, known as H5N1, has spilled from birds into cows at least twice — leading to these two ...

Second bird flu strain detected in dairy cattle for first time Detection came through national milk testing program Containment is critical, veterinary expert says Feb 5 (Reuters) - U.S. dairy ...

Dairy cows in Nevada have been infected with a second version of the avian influenza virus that is different from the one rampaging through herds since the spring, Agriculture Department officials ...