Enterobacter aerogenesEnterobacterEnterobacter cloacaeEnterobacteriaceae InfectionsEnterobacteriaceaeKlebsiellaKlebsiella pneumoniaebeta-LactamasesMicrobial Sensitivity TestsCephalosporinasePyronineCronobacter sakazakiiAnti-Bacterial AgentsCephalosporinsSerratia marcescensGram-Negative Bacteriabeta-LactamsCitrobacter freundiiCephalosporin ResistanceSerratiaPorinsCefoperazoneDNA, BacterialBacteriaDrug Resistance, MicrobialEscherichia coliGenes, BacterialPlasmidsDrug Resistance, BacterialBacterial ProteinsCeftazidimeMolecular Sequence DataIsoelectric Focusingbeta-Lactam ResistanceKlebsiella InfectionsGram-Positive BacteriaBacterial Outer Membrane ProteinsFranceCulture MediaCross InfectionBacterial Typing TechniquesBase SequenceDrug Resistance, Multiple, BacterialChloramphenicolOperonBacteriological TechniquesCloning, MolecularHistidine Ammonia-LyaseElectrophoresis, Gel, Pulsed-FieldEscherichiaSequence Analysis, DNADrug Resistance, MultipleWater MicrobiologyProteusAmino Acid SequenceSugar AlcoholsPseudomonas aeruginosa