title: Heat-labile factor necessary for hemagglutination-inhibition testing of horse sera.
abstract: Normal and immune sera were obtained from horses immunized with either aqueous, alum, or adjuvant bivalent vaccines containing Milford equine 2 virus. Upon heating at 56 C for 30 min, a factor, required for hemagglutination-inhibition but not complement fixation or neutralization testing, was destroyed. This factor which is present in normal sera does not appear to be complement.
mesh_terms: D000276:Adjuvants, Immunologic; D000818:Animals; D000906:Antibodies / Q000032:analysis; D003168:Complement Fixation Tests; D006385:Hemagglutination Inhibition Tests; D006386:Hemagglutination Tests; D006736:Horses / Q000276:immunology*; D006358:Hot Temperature; D007106:Immune Sera; D007252:Influenza Vaccines; D009500:Neutralization Tests; D014611:Vaccination
chemical_list: D000276:Adjuvants, Immunologic; D000906:Antibodies; D007106:Immune Sera; D007252:Influenza Vaccines