title: An aggregating immunoglobulin in hyperimmune equine anti-pneumococcal sera.
mesh_terms: D000818:Animals; D000906:Antibodies / Q000032:analysis; D002845:Chromatography; D006041:Goats; D006736:Horses; D007106:Immune Sera / Q000032:analysis*; D007122:Immunoelectrophoresis; D007271:Injections, Intradermal; D011135:Polysaccharides, Bacterial; D011233:Precipitin Tests; D013296:Streptococcus pneumoniae / Q000276:immunology*; D014461:Ultracentrifugation
chemical_list: D000906:Antibodies; D007106:Immune Sera; D011135:Polysaccharides, Bacterial