Classifications

From 3 genera of fluvirus that cause influenza in man, 2 also cause fluinpigs, with influenzaA its same for pigs and influenzaC rare. InfluenzaB not reported in pig. influenzaA and influenzaC, the strainfound onpigs and inhumans are distinct, this isdueto reassortment, there hasbeen transfergenes among strainscrossingswine, and humanspecies.