Enterobacter cloacaeEnterobacterEnterobacteriaceae InfectionsEnterobacteriaceaeEnterobacter aerogenesCloacabeta-LactamasesMicrobial Sensitivity TestsCephalosporinsAnti-Bacterial AgentsCronobacter sakazakiiEscherichia colibeta-LactamsCephalosporinaseEscherichia coli ProteinsGram-Negative BacteriaCitrobacter freundiiDNA, BacterialDrug Resistance, MicrobialKlebsiellaCephalosporin ResistanceBacteriaCeftazidimePlasmidsBacterial ProteinsPythiumGenes, BacterialKlebsiella pneumoniaeSerratiaCitrobacterDrug Resistance, BacterialCefotaximeSerratia marcescensbeta-Lactam ResistanceEscherichiaEscherichia coli InfectionsImipenemCarbapenemsMolecular Sequence DataNitroreductasesSequence Analysis, DNAGram-Positive BacteriaCross InfectionQuinolonesBase SequenceCloning, MolecularCefoperazoneCeftizoximePenicillanic AcidAztreonamSerratia InfectionsMonobactamsConjugation, GeneticLactamsProteusCefoxitinAmino Acid SequenceThienamycinsCucumis sativusElectrophoresis, Gel, Pulsed-FieldIsoelectric FocusingGram-Negative Bacterial InfectionsTrinitrotolueneBacterial Outer Membrane ProteinsDrug Resistance, Multiple, BacterialKlebsiella oxytocaParabensSulfacetamideAlgeriaIntegronsColony Count, MicrobialBacterial InfectionsBacterial Typing TechniquesCephalexinPolymerase Chain ReactionCulture MediaCiprofloxacinAnti-Infective AgentsAntibiosisBacteriological TechniquesPorinsMutationKineticsCefmenoximePenicillinsEscherichia coli O157PiperacillinPenicillinaseCefotiamHydrolysisCephaloridineEnzyme InductionAmpicillinSilver Nitrate