title: Effect of bovine non-agglutinating antibodies on the blood clearance of 131I-labelled Brucella abortus strain 45/20.
abstract: Non-agglutinating anti-Brucella abortus S45/20 antibodies were isolated and purified from sera of immunized cattle by means of immunoadsorption and ion-exchange chromatography (DEAE-Sephadex A-50). They corresponded to the IgG1 isotype as shown by immunoelectrophoresis using monospecific anti-IgG1 and anti-bovine gamma globulin sera. These antibodies failed to agglutinate the antigen. They were detected by the anti-bovine gamma globulin test, showing higher titres than those of agglutinating antibodies during the whole period of the experiment. Blood clearance of 131I-S45/20 in mice, was slower in those groups which had received non-agglutinating antibodies than in the control group.
mesh_terms: D000372:Agglutination Tests; D000818:Animals; D000907:Antibodies, Bacterial / Q000276:immunology* / Q000302:isolation & purification; D002003:Brucella abortus / Q000276:immunology*; D002006:Brucellosis / Q000276:immunology / Q000662:veterinary*; D002417:Cattle; D002852:Chromatography, Ion Exchange; D007116:Immunization, Passive; D005779:Immunodiffusion; D007122:Immunoelectrophoresis; D007074:Immunoglobulin G / Q000276:immunology / Q000302:isolation & purification; D007163:Immunosorbent Techniques; D008297:Male; D051379:Mice; D009895:Opsonin Proteins; D010587:Phagocytosis
chemical_list: D000907:Antibodies, Bacterial; D007074:Immunoglobulin G; D009895:Opsonin Proteins