Enterobacter cloacaeEnterobacterEnterobacteriaceae InfectionsEnterobacteriaceaeEnterobacter aerogenesCloacabeta-LactamasesMicrobial Sensitivity TestsDrug Resistance, MicrobialAnti-Bacterial AgentsCephalosporinsDrug Resistance, BacterialCronobacter sakazakiibeta-LactamsCephalosporinaseGram-Negative BacteriaCitrobacter freundiiCephalosporin ResistanceKlebsiellaBacteriaCeftazidimeDNA, BacterialKlebsiella pneumoniaeDrug ResistancePythiumbeta-Lactam ResistancePlasmidsDrug Resistance, Multiple, BacterialSerratiaBacterial ProteinsEscherichia coliCefotaximeCitrobacterGenes, BacterialSerratia marcescensMolecular Sequence DataImipenemCarbapenemsEscherichiaSequence Analysis, DNANitroreductasesCross InfectionGram-Positive BacteriaQuinolonesDrug Resistance, NeoplasmConjugation, GeneticDrug Resistance, MultipleCefoperazonePenicillanic AcidCeftizoximeAztreonamSerratia InfectionsLactamsMonobactamsCefoxitinThienamycinsElectrophoresis, Gel, Pulsed-FieldGram-Negative Bacterial InfectionsProteusCucumis sativusAnti-Infective AgentsIntegronsIsoelectric FocusingBase SequenceCiprofloxacinMutationTrinitrotoluenePolymerase Chain ReactionKlebsiella oxytocaDisease ResistanceBacterial InfectionsParabensPenicillinsAmpicillinAlgeriaSulfacetamideCloning, MolecularVascular ResistanceBacterial Typing TechniquesPenicillin ResistanceColony Count, MicrobialPenicillinaseAmino Acid SequenceCephalexinAntibiosisBacterial Outer Membrane ProteinsPiperacillinPseudomonas aeruginosaCefmenoximeDrug Resistance, ViralPorinsBacteriological TechniquesCulture MediaAmikacinCephaloridineCefotiamAminoglycosidesBacteremiaEnzyme InductionSilver Nitrate