title: Differentiation of two serotypes of infectious bronchitis virus by the macrophage migration-inhibition test.
mesh_terms: D000818:Animals; D000956:Antigens, Viral / Q000008:administration & dosage; D001991:Bronchitis / Q000382:microbiology / Q000662:veterinary*; D002464:Cell Migration Inhibition; D002645:Chickens; D003332:Coronaviridae / Q000276:immunology* / Q000302:isolation & purification; D006168:Guinea Pigs; D007271:Injections, Intradermal; D008264:Macrophages / Q000276:immunology*; D008297:Male; D011201:Poultry Diseases / Q000382:microbiology*; D014777:Virus Diseases / Q000382:microbiology / Q000662:veterinary*
chemical_list: D000956:Antigens, Viral