CarbapenemsThienamycinsbeta-LactamasesImipenemAnti-Bacterial Agentsbeta-Lactam ResistanceMicrobial Sensitivity Testsbeta-LactamsAcinetobacter baumanniiDrug Resistance, Multiple, BacterialEnterobacteriaceae InfectionsKlebsiella pneumoniaeDrug Resistance, BacterialAcinetobacter InfectionsPseudomonas aeruginosaGram-Negative BacteriaEnterobacteriaceaeGram-Negative Bacterial InfectionsKlebsiella InfectionsCilastatinPseudomonas InfectionsAcinetobacterCross InfectionDipeptidasesCephalosporinsDrug Resistance, MicrobialEnterobacter cloacaeLactamsBacterial ProteinsClavulanic AcidGlycosuria, RenalPenicillanic AcidGram-Positive BacteriaPorinsCeftazidimeSerratia InfectionsHospitalsDrug Resistance, MultipleBacteremiaElectrophoresis, Gel, Pulsed-FieldPeptidyl TransferasesEscherichia coliDNA, BacterialDrug ResistanceConjugation, GeneticKlebsiella oxytocaAeromonas hydrophilaPlasmidsFormularies, HospitalIntegronsMolecular Sequence DataFluoroquinolonesColistinSerratia marcescensBacteroides fragilisPenicillinsMinocyclineMolecular TypingPiperacillinIntensive Care UnitsAminoglycosidesKlebsiellaBacteroides InfectionsMonobactamsPenicillin-Binding ProteinsAztreonamMuramoylpentapeptide CarboxypeptidasePneumonia, BacterialGenes, BacterialMutationCitrobacter freundiiBacterial Outer Membrane ProteinsMultilocus Sequence TypingHexosyltransferasesbeta-AlanineHospitals, UniversityBacterial InfectionsSequence Analysis, DNAQuinolonesBacteria, AnaerobicEnterobacter aerogenesSulbactamDisk Diffusion Antimicrobial TestsHydrolysisBacteriaPolymerase Chain ReactionDrug UtilizationStenotrophomonas maltophiliaEscherichia coli InfectionsIsoelectric FocusingCephalosporin ResistanceGreeceAnti-Infective AgentsAmino Acid SequenceCefoxitinBacteria, AerobicBacterial LoadStructure-Activity RelationshipKineticsCiprofloxacin