Department of Pathobiological Sciences, School of Veterinary Medicin, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA. olsenc@svm.vetmed.wisc.edu
Since January 2005, H3N2 influenza viruses have been isolated from pigs and turkeys throughout Canada and from a swine farmer and pigs on the same farm in Ontario. These are human/classical swine/avian reassortants similar to viruses that emerged in US pigs in 1998 but with a distinct human-lineage neuraminidase gene.