Penicillium chrysogenumPenicillinsPenicillin GPenicillin VPenicillin ResistancePenicillin G ProcainePenicillin AmidasePenicillin G BenzathineAnti-Bacterial AgentsMicrobial Sensitivity TestsAntibiotic ProphylaxisStreptococcus pneumoniaePenicillin-Binding ProteinsDrug Resistance, MicrobialAmpicillinPenicillinaseDrug Resistance, BacterialCephalosporinsMuramoylpentapeptide Carboxypeptidasebeta-LactamsPeptidyl TransferasesErythromycinGentamicinsHexosyltransferasesStreptococcal InfectionsStreptomycesBacteriaAminoglycosidesPneumococcal InfectionsNeisseria gonorrhoeaeCloxacillinTetracycline