H5N9 is “not commonly seen in poultry in general,” says Eman Anis, assistant professor at the University of Pennsylvania ...

San Mateo County public health officials reported finding H5N1 bird flu in a pet cat and a backyard poultry flock.

New York has ordered a weeklong shutdown of all live bird markets in New York City, Westchester and Long Island after seven ...

The discovery of bird flu in the San Mateo backyard flock prompted health officials to remind people to take biosecurity ...

Chickens and turkeys at commercial poultry operations likely became infected with bird flu through contact with migrating ...

The newly reported H5N9 strain was found Monday at a duck farm in Merced County, California, according to the World ...

First U.S. detection of virulent H5N9 strain, at a California duck farm, draws scrutiny as evidence of genetic reassortment ...

The California duck farm's strain of H5N9 is different from those earlier cases because this time it is closely related to a ...

The USDA Animal and Plant Health Inspection Service (APHIS) recently confirmed the deadly bird flu genotype responsible for ...

Experts stressed that the new strain did not itself appear to be an immediate human threat. But the rise of a new strain is troubling and points to the risk of a viral phenomenon known as ...

Bird flu infections around the U.S. have forced mass cullings and resulted in the deaths of zoo animals and pets ...

US officials are investigating the appearance of a strain of bird flu identified in the US for the first time, a worrying ...