title: Infectivity of infectious bursal disease virus for embryonating eggs.
mesh_terms: D000818:Animals; D000917:Antibody Formation; D002642:Chick Embryo; D002645:Chickens; D007668:Kidney / Q000382:microbiology; D011201:Poultry Diseases / Q000276:immunology / Q000382:microbiology*; D014776:Virus Cultivation; D014777:Virus Diseases / Q000276:immunology / Q000662:veterinary*; D014713:Viruses, Unclassified / Q000254:growth & development* / Q000302:isolation & purification