Originally found mostly in wild birds and poultry, H5N1 clade 2.3.4.4b, genotype D1.1, was discovered in dairy cattle last ...

The variant of bird flu that killed a Louisiana resident has now been found in dairy cows. Until now, the human cases of bird ...

For the first time, a new genotype of avian influenza has been identified in U.S. dairy cows, prompting biosecurity efforts. D1.1 — as the new strain of H5N1 is called — has now left researchers ...

Experts said it raises new questions about wider spread and the difficulty of controlling infections in animals and the ...

The strain of bird flu is distinct from what has previously been found in dairy cattle. The finding means the virus has again ...

U.S. dairy cattle tested positive for a strain of bird flu that previously had not been seen in cows, the U.S. Department of ...

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