Enterobacter cloacaeEnterobacterEnterobacteriaceae InfectionsEnterobacteriaceaeEnterobacter aerogenesCloacabeta-LactamasesCross InfectionMicrobial Sensitivity TestsAnti-Bacterial AgentsCephalosporinsCronobacter sakazakiiGram-Negative Bacteriabeta-LactamsCephalosporinaseCitrobacter freundiiDrug Resistance, MicrobialKlebsiella pneumoniaeKlebsiellaCephalosporin ResistanceCeftazidimeBacteriaDNA, BacterialPythiumDrug Resistance, BacterialSerratia marcescensSerratiabeta-Lactam ResistanceImipenemCitrobacterCefotaximePlasmidsBacterial ProteinsGram-Negative Bacterial InfectionsSerratia InfectionsGram-Positive BacteriaEscherichiaElectrophoresis, Gel, Pulsed-FieldDrug Resistance, Multiple, BacterialEscherichia coliCarbapenemsGenes, BacterialBacteremiaNitroreductasesSequence Analysis, DNAPenicillanic AcidDisease OutbreaksMolecular Sequence DataQuinolonesBacterial Typing TechniquesCefoperazoneCeftizoximeLactamsBacterial InfectionsAztreonamKlebsiella oxytocaProteusMonobactamsCefoxitinConjugation, GeneticCucumis sativusIsoelectric FocusingThienamycinsPiperacillinAnti-Infective AgentsPseudomonas aeruginosaAlgeriaTrinitrotolueneKlebsiella InfectionsIntegronsHospitals, UniversityParabensCiprofloxacinIntensive Care Units, NeonatalPolymerase Chain ReactionSulfacetamideColony Count, MicrobialHospitalsIntensive Care UnitsPenicillinsBacteriological TechniquesCephalexinAmpicillinCefmenoximeMolecular TypingAmikacinAntibiosisCefotiamPorinsBacterial Outer Membrane ProteinsPenicillinaseBase SequenceCephaloridine