title: Bacterial interference. II. Role of the normal throat flora in prevention of colonization by group A Streptococcus.
mesh_terms: D000362:Agar; D001419:Bacteria / Q000276:immunology*; D001431:Bacteriological Techniques; D002648:Child; D006801:Humans; D009343:Neisseria / Q000302:isolation & purification; D010612:Pharyngitis / Q000382:microbiology; D010614:Pharynx / Q000382:microbiology*; D011446:Prospective Studies; D013291:Streptococcus / Q000254:growth & development* / Q000302:isolation & purification / Q000472:pathogenicity; D013296:Streptococcus pneumoniae / Q000302:isolation & purification
chemical_list: D000362:Agar