beta-LactamasesCarbapenemsKlebsiella pneumoniaebeta-Lactam ResistanceEnterobacteriaceaeEnterobacteriaceae InfectionsKlebsiella InfectionsAcinetobacter baumanniibeta-LactamsMicrobial Sensitivity TestsAnti-Bacterial AgentsImipenemBacterial ProteinsAcinetobacter InfectionsThienamycinsDrug Resistance, Multiple, BacterialKlebsiella oxytocaDrug Resistance, BacterialEnterobacter cloacaeElectrophoresis, Gel, Pulsed-FieldDisk Diffusion Antimicrobial TestsMultilocus Sequence TypingAcinetobacterClavulanic AcidMolecular TypingGram-Negative BacteriaPenicillanic AcidPlasmidsCitrobacter freundiiDNA, BacterialHospitalsPolymerase Chain ReactionCeftazidimeMolecular EpidemiologyCross InfectionEscherichia coliDNA FingerprintingEscherichia coli InfectionsMultiplex Polymerase Chain ReactionSequence Analysis, DNAGreeceGram-Negative Bacterial InfectionsBacteriological TechniquesIntegronsCephalosporinsBacterial Typing TechniquesConjugation, GeneticDisease OutbreaksGene Transfer, HorizontalIsoelectric FocusingHospitals, UniversityMinocyclineGenes, BacterialAcinetobacter calcoaceticusPseudomonas aeruginosaSensitivity and SpecificityGenotypeMolecular Sequence DataKlebsiellaDNA Transposable ElementsCluster AnalysisIntensive Care UnitsHydrolysisSpainPorinsReal-Time Polymerase Chain ReactionNew York CityCefotaximeBacteremiaEnterobacterBlotting, SouthernProteus mirabilisCulture MediaPhylogenyKuwaitSerratia InfectionsEnterobacter aerogenesAlgeriaAmino Acid SequenceBase SequenceUrinary Tract InfectionsCrystallography, X-RayCharadriiformesCommunity-Acquired InfectionsProteus InfectionsCloacaPiperacillinAztreonamAzabicyclo CompoundsKineticsFecesIntraabdominal InfectionsMorganella morganiiQuinolonesCitrobacterChromogenic CompoundsMonobactamsPetsPrevalenceCefoxitin