CHICAGO, Oct 30 (Reuters) - H5N1 bird flu was confirmed in a pig on a backyard farm in Oregon, the first detection of the virus in swine in the country, the U.S. Department of Agriculture said on Wednesday.
Pigs represent a particular concern for the spread of bird flu because they can become co-infected with bird and human viruses, which could swap genes to form a new, more dangerous virus that can more easily infect humans.
The USDA said there is no risk to the nation's pork supply from the Oregon case and that the risk to the public from bird flu remains low.
Pigs were the source of the H1N1 flu pandemic in 2009-2010, and have been implicated as the source of others, said Richard Webby, a St. Jude Children's Research Hospital virologist who studies flu in animals and birds for the World Health Organization.
