CephalosporinsCephalosporin ResistanceAcremoniumCefotaximeCephalexinCephalosporinaseMicrobial Sensitivity TestsCeftriaxoneCephalothinAnti-Bacterial AgentsCefmenoximeCephaloridinebeta-LactamasesCeftizoximePenicillin AmidaseBacteriaCefazolinCefaclorCefiximeCefamandoleCeftazidimeEnterobacteriaceaePenicillinsCefuroximeBacterial InfectionsEnterobacterCefonicidPenicillin-Binding ProteinsGram-Negative BacteriaCephradineGram-Positive BacteriaCefotiamPenicillinaseDrug StabilityDrug Resistance, MicrobialAcetylesteraseMuramoylpentapeptide CarboxypeptidasePenicillin ResistancePeptidyl TransferasesPenicillin GHexosyltransferasesCefoperazoneEnterobacteriaceae InfectionsCefoxitinCephapirinAmpicillinCefsulodinCephamycinsCefotetanEscherichia coliChemistryChemical PhenomenaStaphylococcus aureusbeta-LactamsKlebsiella pneumoniaePseudomonas aeruginosaPenicillanic Acidbeta-Lactam ResistanceAztreonamFleroxacinPseudomonasKlebsiellaChild Development Disorders, PervasiveDrug Resistance, BacterialMice, Inbred ICRProteusKlebsiella InfectionsHydrolysisKineticsBacterial ProteinsCephacetrileMandelic AcidsCloxacillinAmidohydrolasesNeisseria gonorrhoeaeClavulanic AcidsStreptococcus pneumoniaePhleomycinsCefmetazolePaecilomycesStaphylococcusAdipatesProdrugsLactamsInjections, IntramuscularMoxalactamHalf-LifeAdministration, OralPenicillium chrysogenumMethicillin ResistanceDrug Resistance, Multiple, BacterialSpectrum AnalysisCulture MediaThiadiazolesMutationMolecular Sequence DataCorynebacterium pyogenesNetilmicinSkin Diseases, BacterialGonorrhea