Penicillin G ProcainePenicillin GProcainePenicillinsPenicillin VPenicillin ResistancePenicillin AmidasePenicillin G BenzathineAnti-Bacterial AgentsMicrobial Sensitivity TestsPenicillin-Binding ProteinsPenicillinaseSkinStreptococcus pneumoniaeAmpicillinMuramoylpentapeptide CarboxypeptidaseCephalosporinsStreptococcal InfectionsPeptidyl TransferasesGonorrheaHexosyltransferasesNeisseria gonorrhoeaeSpectinomycinErythromycinPneumococcal InfectionsProbenecidCeftriaxoneCloxacillinCefotaximebeta-LactamsNeurosyphilisDrug Resistance, MicrobialDrug HypersensitivityStreptococcusCephalothinPhenylacetatesPeptidoglycanCephaloridine