title: Identification of group A streptococci by "office bacteriology".
mesh_terms: D001414:Bacitracin; D001431:Bacteriological Techniques; D002648:Child; D006801:Humans; D010612:Pharyngitis / Q000382:microbiology; D013297:Streptococcus pyogenes / Q000254:growth & development / Q000302:isolation & purification*
chemical_list: D001414:Bacitracin