CarbapenemsThienamycinsbeta-LactamasesImipenembeta-Lactam ResistanceAnti-Bacterial Agentsbeta-LactamsAcinetobacter baumanniiMicrobial Sensitivity TestsEnterobacteriaceae InfectionsKlebsiella pneumoniaeAcinetobacter InfectionsDrug Resistance, Multiple, BacterialPseudomonas aeruginosaGram-Negative BacteriaEnterobacteriaceaeGram-Negative Bacterial InfectionsDrug Resistance, BacterialKlebsiella InfectionsCilastatinPseudomonas InfectionsDipeptidasesAcinetobacterCross InfectionEnterobacter cloacaeCephalosporinsLactamsGlycosuria, RenalClavulanic AcidPenicillanic AcidBacterial ProteinsPorinsGram-Positive BacteriaSerratia InfectionsCeftazidimeHospitalsKlebsiella oxytocaFormularies, HospitalBacteremiaAeromonas hydrophilaPeptidyl TransferasesIntegronsElectrophoresis, Gel, Pulsed-FieldConjugation, GeneticSerratia marcescensColistinIntensive Care UnitsBacteroides fragilisDrug Resistance, MicrobialPiperacillinBacteroides InfectionsMonobactamsPlasmidsMolecular TypingDNA, BacterialAztreonamMinocyclineEscherichia coliPneumonia, Bacterialbeta-AlanineKlebsiellaCitrobacter freundiiMuramoylpentapeptide CarboxypeptidaseFluoroquinolonesHospitals, UniversityPenicillin-Binding ProteinsEnterobacter aerogenesBacterial Outer Membrane ProteinsMultilocus Sequence TypingDrug UtilizationBacteria, AnaerobicSulbactamPenicillinsAminoglycosidesDrug Resistance, MultipleStenotrophomonas maltophiliaHexosyltransferasesDisk Diffusion Antimicrobial TestsHydrolysisBacterial InfectionsGenes, BacterialIsoelectric FocusingQuinolonesGreeceMolecular Sequence DataBacterial LoadSequence Analysis, DNACefoxitinEscherichia coli InfectionsBacteria, AerobicFlavobacteriumBacteriaCephalosporin ResistancePneumonia, Ventilator-AssociatedPolymerase Chain ReactionHospitals, TeachingStructure-Activity Relationship