Penicillin VPenicillinsPenicillin GPenicillin AmidasePenicillin ResistancePharyngitisPenicillin G ProcaineTonsillitisBacteriaPenicillin G BenzathinePenicillium chrysogenumAnti-Bacterial AgentsStreptococcal InfectionsCefuroximeCephalosporinsStreptococcus sanguisRheumatic FeverAdenoidsMicrobial Sensitivity TestsStreptococcus pyogenesAmidohydrolasesStreptococcus pneumoniaePenicillin-Binding ProteinsPenicillinaseGram-Negative Bacteria