CefotaximeCephalosporinsMicrobial Sensitivity TestsMoxalactamAnti-Bacterial AgentsCephalosporin Resistancebeta-LactamasesCephamycinsCefoperazoneCeftazidimeDrug Resistance, Microbialbeta-LactamsCeftriaxoneEnterobacteriaceaePenicillin ResistanceCeftizoximePenicillinsEscherichia coliStreptococcus pneumoniaeSequence Analysis, DNAEnterobacteriaceae Infectionsbeta-Lactam ResistanceBacteriaSpecies SpecificityCefoxitinCefmenoximeAztreonamDrug Resistance, BacterialCephalosporinaseLactamsKlebsiella pneumoniaeImipenemBacterial Typing TechniquesGenes, BacterialDNA, BacterialPlasmidsPenicillin-Binding ProteinsRNA, Ribosomal, 16SPiperacillinCefuroximeEnterobacterThienamycinsGram-Negative BacteriaCulture MediaMice, Inbred StrainsAmpicillinDNA, RibosomalCefotiamMutationSerotypingElectrophoresis, Gel, Pulsed-FieldKlebsiella InfectionsAmpicillin ResistanceEscherichia coli InfectionsCiprofloxacinBacterial ProteinsMeningitisConjugation, GeneticClavulanic AcidVirulenceKlebsiellaPolymerase Chain ReactionPseudomonas aeruginosaMuramoylpentapeptide CarboxypeptidaseMolecular Sequence DataBacterial InfectionsPhenotypeHexosyltransferasesAnti-Infective AgentsPneumococcal InfectionsPeptidyl TransferasesAmino Acid SequenceAzlocillinPseudomonasSerum Bactericidal TestNeisseria gonorrhoeaeClavulanic AcidsTobramycinPenicillanic AcidStaphylococcus aureusGentamicinsPenicillin GEmpiricismIsoelectric FocusingColony Count, MicrobialMeningitis, PneumococcalHaemophilus influenzaeDNA FingerprintingVancomycinStreptococcusGenotypeGram-Positive BacteriaAmikacinFleroxacinProteus vulgarisBase CompositionKineticsBacteroides fragilisDrug Resistance, Multiple, BacterialCloning, Molecular