title: Virulent Newcastle disease virus in Australia: in through the 'back door'.
authors.forename: P D
authors.initials: PD
authors.lastname: Kirkland
mesh_terms: D000818:Animals; D001315:Australia / Q000453:epidemiology; D004196:Disease Outbreaks / Q000517:prevention & control / Q000662:veterinary*; D009521:Newcastle Disease / Q000453:epidemiology* / Q000517:prevention & control*; D009522:Newcastle disease virus / Q000472:pathogenicity*; D011200:Poultry; D014730:Veterinary Medicine / Q000458:organization & administration*