The occurrence of serotype 4 of avian influenza A virus in Canadian poultry.
D000818:Animals; D002170:Canada; D004372:Ducks; D009980:Influenza A virus / Q000145:classification / Q000302:isolation & purification*; D005585:Influenza in Birds / Q000453:epidemiology / Q000382:microbiology; D014422:Turkeys