title: Short communication. "Sombrero" hemolytic plaques due to antibody of a single specificity against pneumococcal polysaccharide.
mesh_terms: D000818:Animals; D000907:Antibodies, Bacterial; D000918:Antibody Specificity; D000937:Antigen-Antibody Reactions; D004912:Erythrocytes / Q000276:immunology; D006462:Hemolytic Plaque Technique; D007075:Immunoglobulin M; D011135:Polysaccharides, Bacterial; D011828:Radiation Chimera; D012756:Sheep / Q000276:immunology; D013296:Streptococcus pneumoniae / Q000276:immunology
chemical_list: D000907:Antibodies, Bacterial; D007075:Immunoglobulin M; D011135:Polysaccharides, Bacterial