title: Immunodiffusion studies on pneumococcal antigens with special reference to serotype 27.
mesh_terms: D000942:Antigens, Bacterial; D001426:Bacterial Proteins / Q000032:analysis*; D005779:Immunodiffusion; D007122:Immunoelectrophoresis; D011135:Polysaccharides, Bacterial / Q000032:analysis*; D012703:Serotyping; D013296:Streptococcus pneumoniae / Q000276:immunology*
chemical_list: D000942:Antigens, Bacterial; D001426:Bacterial Proteins; D011135:Polysaccharides, Bacterial