Tyson Foods finds 15,000 chickens exposed to "mild" strain of bird flu
03 Jun 2008 Tyson Foods Inc, the second largest U.S. chicken producer, said on Tuesday it will destroy about 15,000 chickens in Arkansas exposed to a mild strain of bird flu, and while there was no risk to human health the news sent its shares lower. The affected chickens... had antibodies of a mild or low pathogenic strain of bird flu called H7N3. It is the deadly high pathogenic H5N1 strain, which has never been found in the United States, that worries scientists because it has spread to and killed people around the world.