title: An improved assay for haemolytic plaque-forming cells.
mesh_terms: D000818:Animals; D000917:Antibody Formation; D000921:Antibody-Producing Cells; D001345:Autoradiography; D004912:Erythrocytes / Q000276:immunology; D006168:Guinea Pigs; D006462:Hemolytic Plaque Technique; D008722:Methods; D051379:Mice; D012756:Sheep; D013154:Spleen / Q000166:cytology / Q000276:immunology