title: Studies on the virulence of pigeon paramyxovirus-1 (PMV-1). I. Changes in the virulence of pigeon PMV-1 strains isolated in Hungary upon passage in chickens, embryonated hen's eggs and pigeons.
authors.forename: B
authors.initials: B
authors.lastname: Kissi
mesh_terms: D000818:Animals; D001715:Bird Diseases / Q000382:microbiology*; D002642:Chick Embryo; D002645:Chickens; D010856:Columbidae; D006814:Hungary; D010252:Paramyxoviridae / Q000472:pathogenicity*; D010253:Respirovirus Infections / Q000382:microbiology / Q000662:veterinary*; D012692:Serial Passage; D013047:Specific Pathogen-Free Organisms; D014774:Virulence