EnterobacteriaceaeEnterobacteriaceae Infectionsbeta-LactamasesMicrobial Sensitivity TestsAnti-Bacterial Agentsbeta-Lactam ResistanceEnterobacterSerratiaProteusCarbapenemsBacteriological TechniquesKlebsiellaEscherichiaKlebsiella pneumoniaebeta-LactamsCephalosporinsGram-Negative BacteriaCitrobacterBacteriaEscherichia coliDrug Resistance, BacterialDrug Resistance, Multiple, BacterialDrug Resistance, MicrobialSalmonellaEnterobacter cloacaeKlebsiella InfectionsSerratia marcescensBacterial ProteinsDNA, BacterialGram-Negative Bacterial InfectionsVibrionaceaeEvaluation Studies as TopicAztreonamCefotaximeCeftazidimeProteus mirabilisKlebsiella oxytocaProvidenciaShigellaCephalosporin ResistanceCulture MediaKluyveraPseudomonadaceaeCitrobacter freundiiFecesPseudomonas aeruginosaPenicillanic AcidCross InfectionThienamycinsAzabicyclo CompoundsConjugation, GeneticQuinolonesPlasmidsGram-Positive BacteriaImipenemErwiniaBacteria, AerobicAnti-Infective AgentsClavulanic AcidBacterial InfectionsAminoglycosidesAmikacinBacteremiaAcinetobacterAntisepsisPiperacillinFluoroquinolonesSequence Analysis, DNAHospitalsKanamycinCiprofloxacinMinocyclineGene Transfer, HorizontalDisk Diffusion Antimicrobial TestsGentamicinsIntegronsSpecies SpecificityYersiniaChromogenic CompoundsGenes, BacterialPolymerase Chain ReactionAgarBacterial Typing TechniquesCefoxitinEsculinFermentationMolecular Sequence DataMolecular TypingBacteria, AnaerobicElectrophoresis, Gel, Pulsed-FieldPseudomonasCefoperazoneProteus vulgarisEscherichia coli InfectionsMultilocus Sequence TypingAeromonasCeftizoximeTicarcillinSalmonella typhimuriumCarbenicillin