The state has required precautionary bulk milk testing since November for Pennsylvania's roughly 4,900 dairy farms.

Horses have been infected by bird flu without symptoms, raising concerns the virus could spread to other species, including ...

The Department of Fish and Wildlife said the highly pathogenic avian influenza was detected in migratory birds across the ...

This strain of avian influenza, which had previously affected birds and some species of mammals, first appeared in cattle in Texas and Kansas last spring. Despite its clear potential to spread, the ...

hence the name avian referring to birds. Detections for bird flu in poultry flocks are more common in the spring and fall because wild birds spread the virus through migration, according to the USDA.