A strain of avian influenza that has likely sickened and killed millions of birds around the globe has popped up in an unexpected species: Cows.
On April 1, the U.S. Department of Agriculture confirmed that cattle on a farm in New Mexico had tested positive for a strain of bird flu called H5N1. The news followed a March 25 announcement that officials had detected the virus on two dairy farms in Kansas and two Texas farms. The virus was also detected in a Michigan herd that had recently received cows from Texas, the USDA reported on March 29. Five additional herds in Texas have tested positive, and an outbreak
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