CephalosporinsPenicillinsPenicillin GPenicillin VPenicillin ResistancePenicillin G ProcaineAnti-Bacterial AgentsPenicillin AmidaseMicrobial Sensitivity Testsbeta-LactamasesPenicillin G BenzathineCephalosporin ResistanceCephaloridineCefotaximePenicillinaseCephalosporinasebeta-LactamsCephalexinCeftriaxoneCefiximeCephalothinPenicillin-Binding ProteinsDrug Resistance, MicrobialAmpicillinStreptococcus pneumoniaeCefmenoximeBacteriaEnterobacteriaceaebeta-Lactam ResistanceCeftizoximeNeisseria gonorrhoeaeCeftazidimeEnterobacterMuramoylpentapeptide CarboxypeptidaseDrug Resistance, BacterialCefazolinCefotiamCephradineCloxacillinAztreonamGonorrheaPeptidyl TransferasesKlebsiella pneumoniaeHexosyltransferasesCefoxitinCefamandoleLactamsEscherichia coliKlebsiellaGram-Negative BacteriaPneumococcal InfectionsEnterobacteriaceae InfectionsCefuroximeCephamycinsPenicillanic AcidCefaclorDrug Resistance, Multiple, BacterialCarbapenemsStreptococcal InfectionsBacterial InfectionsCefadroxilDrug HypersensitivityCefoperazoneProteusClavulanic AcidBacterial ProteinsCefmetazoleMoxalactamIsoelectric FocusingAcremoniumKlebsiella InfectionsImipenemCross InfectionErythromycinCarbenicillinStreptococcusEnterobacter cloacaeGram-Positive BacteriaCefotetanClavulanic AcidsStructure-Activity RelationshipStaphylococcusDrug UtilizationStaphylococcus aureusCephaloglycinMethicillinPiperacillinCulture MediaThienamycinsGentamicinsPharyngitisChemistryDNA, BacterialGram-Negative Bacterial InfectionsOxacillinHydrolysisSarcinaChemical PhenomenaMonobactamsCefsulodin