title: [Viral etiology of a disease accompanied by hepatitis and feather disorders in budgerigar fledgelings (Melopsittacus undulatus)].
mesh_terms: D000818:Animals; D001715:Bird Diseases / Q000209:etiology*; D005241:Feathers; D006520:Hepatitis, Animal / Q000209:etiology*; D008854:Microscopy, Electron; D010240:Parakeets; D011563:Psittaciformes; D012871:Skin Diseases / Q000209:etiology / Q000662:veterinary*; D014713:Viruses, Unclassified / Q000302:isolation & purification / Q000648:ultrastructure
vernacular_title: Untersuchungen zur Virusätiologie einer mit Hepatitis und Befiederungsstörungen einhergehender Krankheit bei Wellesittich-Nestlingen (Melopsittacus undulatus).