Penicillin resistant alpha Streptococci in pharynx of patients given oral penicillin.

Child Dosage Forms Endocarditis, Bacterial/drug therapy Erythromycin/therapeutic use Humans Injections, Intramuscular Lincomycin/therapeutic use Penicillin Resistance Penicillins/administration & dosage Pharynx/microbiology Rheumatic Fever/drug therapy Streptococcus/drug effects,isolation & purification

Dosage Forms Penicillins Erythromycin Lincomycin