title: Persistent infection of heteroploid and diploid cells with plaque variants of Newcastle disease virus.
mesh_terms: D000818:Animals; D002642:Chick Embryo; D002869:Chromosome Aberrations; D046508:Culture Techniques; D003588:Cytopathogenic Effect, Viral; D014644:Genetic Variation; D006367:HeLa Cells; D006801:Humans; D009522:Newcastle disease virus