CephalosporinsPenicillinsPenicillin GPenicillin VPenicillin ResistanceCephalosporin ResistanceMicrobial Sensitivity TestsAnti-Bacterial AgentsPenicillin Amidasebeta-LactamasesAcremoniumCefotaximeCephalexinCephalosporinaseCephaloridinePenicillin G ProcaineCeftriaxoneCephalothinCefiximeCefmenoximePenicillinasePenicillin G BenzathineCeftizoximeBacteriaPenicillin-Binding ProteinsEnterobacteriaceaebeta-LactamsCefazolinCeftazidimeDrug Resistance, MicrobialEnterobacterCefamandoleCefaclorAmpicillinCephradineCefotiamCefuroximeMuramoylpentapeptide CarboxypeptidaseStreptococcus pneumoniaebeta-Lactam ResistanceGram-Negative BacteriaBacterial InfectionsPeptidyl TransferasesHexosyltransferasesNeisseria gonorrhoeaeDrug Resistance, BacterialAztreonamCefoxitinKlebsiella pneumoniaeCloxacillinEnterobacteriaceae InfectionsGonorrheaGram-Positive BacteriaCephamycinsKlebsiellaEscherichia coliCefoperazonePenicillanic AcidLactamsCefonicidProteusDrug Resistance, Multiple, BacterialDrug StabilityBacterial ProteinsCefotetanCefmetazoleCefsulodinKlebsiella InfectionsMoxalactamCefadroxilPneumococcal InfectionsStaphylococcus aureusClavulanic AcidChemistryChemical PhenomenaCarbapenemsClavulanic AcidsPseudomonas aeruginosaHydrolysisDrug HypersensitivityStaphylococcusCephapirinImipenemCross InfectionCulture MediaCarbenicillinStructure-Activity RelationshipIsoelectric FocusingPiperacillinEnterobacter cloacaeMethicillinGram-Negative Bacterial InfectionsStreptococcusKineticsDrug UtilizationStreptococcal InfectionsAmidohydrolasesGentamicinsThienamycinsFluoroquinolones