title: Isolation of an Influenza A virus from the budgerigar, Melopsittacus undulatus.
mesh_terms: D000818:Animals; D000956:Antigens, Viral / Q000032:analysis; D009980:Influenza A virus / Q000276:immunology / Q000302:isolation & purification*; D005585:Influenza in Birds / Q000382:microbiology*; D010240:Parakeets; D011563:Psittaciformes
chemical_list: D000956:Antigens, Viral