Penicillin resistant alpha Streptococci in pharynx of patients given oral penicillin.
D002648:Child; D004304:Dosage Forms; D004697:Endocarditis, Bacterial / Q000188:drug therapy; D004917:Erythromycin / Q000627:therapeutic use; D006801:Humans; D007273:Injections, Intramuscular; D008034:Lincomycin / Q000627:therapeutic use; D010403:Penicillin Resistance; D010406:Penicillins / Q000008:administration & dosage*; D010614:Pharynx / Q000382:microbiology*; D012213:Rheumatic Fever / Q000188:drug therapy; D013291:Streptococcus / Q000187:drug effects* / Q000302:isolation & purification