Citrobacter freundiiCitrobacterEnterobacterEnterobacter cloacaeEnterobacteriaceae InfectionsCitrobacter rodentiumEnterobacteriaceaeEscherichiaTyrosine Phenol-LyaseEnterobacter aerogenesCitrobacter koseribeta-LactamasesCephalosporinaseMicrobial Sensitivity TestsSerratiaCephalosporinsGram-Negative BacteriaAnti-Bacterial AgentsCronobacter sakazakiiCefotaximeBacteriaKlebsiellaPyronineEscherichia coliDicloxacillinProteus vulgarisCeftazidimebeta-LactamsSerratia marcescensUranium CompoundsKlebsiella oxytocaDrug Resistance, MicrobialBacterial ProteinsCephalosporin ResistanceGenes, BacterialPlasmidsCefotiamDNA, BacterialMonobactamsbeta-Lactam ResistanceCefmenoximeCephaloridineKlebsiella pneumoniaeMolecular Sequence DataPenicillinaseGram-Positive BacteriaProteusThienamycinsConjugation, GeneticCarbapenemsCloxacillinPenicillanic AcidAmpicillinCefiximeImipenemProteus mirabilisCeftizoximeIsoelectric FocusingSalmonellaQuinolonesBase SequenceDrug Resistance, BacterialChromosomes, BacterialSequence Analysis, DNABacteriological TechniquesEscherichia coli ProteinsWater MicrobiologyBacterial InfectionsCloning, MolecularCeftriaxoneCulture MediaAmino Acid SequenceSpecies Specificity