title: Persistence of group A streptococci as related to penicillinase-producing staphylococci: comparison of penicillin V potassium and sodium nafcillin.
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D006801:Humans; D009254:Nafcillin / Q000627:therapeutic use*; D010403:Penicillin Resistance; D010404:Penicillin V / Q000627:therapeutic use*; D010405:Penicillinase / Q000096:biosynthesis; D012141:Respiratory Tract Infections / Q000188:drug therapy* / Q000382:microbiology; D013210:Staphylococcus / Q000201:enzymology; D013290:Streptococcal Infections / Q000188:drug therapy*; D013297:Streptococcus pyogenes / Q000302:isolation & purification
chemical_list: D009254:Nafcillin; D010405:Penicillinase; D010404:Penicillin V