A new variant of H5N1 bird flu, known as D1.1, has been detected in dairy cattle in Nevada. This marks the first time this strain has been found in cows, showing symptoms like coughing and sneezing.

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.

Tagged birds were identified by coloured flags (tag 2R0 was tagged in 2022 and 4T5 and 4T8 were tagged in 2024), which allow researchers to track their movements whenever they are spotted and reported ...

Dairy cattle in Nevada have been infected with a new type of bird flu that’s different from the version that has spread in U.S. herds since last year, Agriculture Department officials said ...