A new strain of bird flu has been detected in US dairy cattle, raising concerns about its potential transmission and impact on livestock and public health. The USDA confirmed that highly pathogenic avian influenza (HPAI) H5N1,

Most of the bird flu cases reported so far in the U.S. have belonged to an influenza subtype known as HPAI H5N1. The newly reported subtype in Merced County is called “HPAI H5N9.” Although H5N9 has been reported before in the U.S., this was the first time it was reported as “highly pathogenic.”

A second form of bird flu has been found in Nevada dairy cows, the U.S. Department of Agriculture announced Wednesday.

The variant of bird flu that killed a Louisiana resident has now been found in dairy cows. Until now, the human cases of bird flu traced to cattle have been mild, mostly eye infections. But the U.S. Department of Agriculture confirmed that a strain previously found only in wild birds has turned up in dairy herds in Nevada ‒ raising concerns that future human infections could be more serious.

A new strain of bird flu has infected dairy cows in Nevada, marking the second time the virus has jumped from birds to cattle. This latest infection — reported by the U.S. Department of Agriculture (USDA) Wednesday — involves a strain of H5N1,

A second type of bird flu has been found in U.S. dairy cows for the first time, the U.S. Department of Agriculture announced Wednesday.

A branch of the H5N1 bird flu family tree that hadn't previously been seen in cattle has now been detected in dairy cows.