H5N1 bird flu has been identified in a pig in the United States for the first time, the US Department of Agriculture said Wednesday. The USDA and Oregon veterinary officials are investigating bird flu cases in a backyard farming operation that had a mix of poultry and livestock,

New CDC research suggests that a small but significant percentage of dairy farmers working near infected cows have recently contracted H5N1, often without knowing.

The presentation, so brief as to be little more than a public service announcement, signals an abandonment of efforts to prevent the emergence of a wider avian flu pandemic.

The Hawaii Department of Health detected H5 avian influenza, or bird flu, on Oahu for the first time from a wastewater sampling site.