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25. Characterization of beta-lactamases responsible for resistance to extended-spectrum cephalosporins in Escherichia coli and Salmonella enterica strains from food-producing animals in the United Kingdom. Liebana E; Gibbs M; Clouting C; Barker L; Clifton-Hadley FA; Pleydell E; Abdalhamid B; Hanson ND; Martin L; Poppe C; Davies RH Microb Drug Resist; 2004; 10(1):1-9. PubMed ID: 15140388 [TBL] [Abstract][Full Text] [Related]
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30. Production of beta-lactam antibiotics and its regulation. Demain AL Proc Natl Sci Counc Repub China B; 1991 Oct; 15(4):251-65. PubMed ID: 1815263 [TBL] [