Identification of human H1N2 and human-swine reassortant H1N2 and H1N1 influenza a viruses among pigs in Ontario, Canada (2003 to 2005)

Since 2003, three novel genotypes of HI influenza viruses have been recovered from Canadian pigs, including a wholly human HIN2 virus and human-swine reassortants. These isolates demonstrate that human-lineage HIN2 viruses are infectious for pigs and that viruses with a human PBI/swine PA/swine PB2 polymerase complex can replicate in pigs.