Citrobacter freundiiCitrobacterCitrobacter rodentiumEnterobacteriaceae InfectionsTyrosine Phenol-LyaseEscherichiaCitrobacter koseriEnterobacteriaceaeCephalosporinasebeta-LactamasesEnterobacterEnterobacter cloacaeMicrobial Sensitivity TestsSerratiaCefotaximeDicloxacillinPyronineGram-Negative BacteriaProteus vulgarisCephalosporinsAnti-Bacterial AgentsUranium CompoundsEscherichia coliBacteriaCeftazidimeBacterial ProteinsKlebsiella oxytocaGenes, BacterialSerratia marcescensCefotiamCefmenoximeMonobactamsPlasmidsMolecular Sequence Databeta-LactamsDrug Resistance, MicrobialCephaloridinePenicillinaseDNA, BacterialCephalosporin ResistanceKlebsiellaCloxacillinbeta-Lactam ResistanceThienamycinsGram-Positive BacteriaConjugation, GeneticCefiximeCarbapenemsProteus mirabilisAmpicillinKlebsiella pneumoniaeProteusBase SequencePenicillanic AcidSalmonellaCeftizoximeChromosomes, BacterialIsoelectric FocusingEscherichia coli ProteinsImipenemQuinolones