New swine flu subtype has avian flu genes

Researchers have identified a new strain of swine influenza, H2N3, which belongs to the group of H2 influenza viruses that last infected humans during the 1957 pandemic. This new strain has a molecular twist—it is composed of avian and swine influenza genes.

Agricultural Research Service veterinarians, Drs. Juergen Richt, Amy Vincent, Kelly Lager, and Phillip Gauger, conducted this research with Iowa State University visiting scientist Wenjun Ma; ISU veterinary pathologist, Dr. Bruce Janke; and other colleagues at the University of Minnesota and St. Jude Children's Research Hospital. The ARS veterinarians work at the agency's National Animal Disease Center in Ames, Iowa

http://www.avma.org/onlnews/javma/feb08/080215k.asp