We characterized 67 Escherichia coli isolates with reduced susceptibility to cefotaxime or ceftiofur obtained from healthy broilers housed in five Italian farms. The blaCTX-M-1, blaCTX-M-32 and blaSHV-12 beta-lactamase genes were identified on IncI1, IncN, or IncFIB plasmids. Considerable genetic diversity was detected among the extended-spectrum beta-lactamase (ESBL)-producing isolates, and we identified indistinguishable strains in unrelated farms and indistinguishable plasmids in genetically unrelated strains. The detection of highly mobile plasmids suggests a potential animal reservoir for beta-lactamase genes.

High Diversity of Extended-Spectrum beta-Lactamases in Escherichia coli Isolates from Italian Broiler Flocks / V. Bortolaia; L. Guardabassi; M. Trevisani; M. Bisgaard; L. Venturi; A.M. Bojesen. - In: ANTIMICROBIAL AGENTS AND CHEMOTHERAPY. - ISSN 0066-4804. - STAMPA. - 54:(2010), pp. 1623-1626. [10.1128/AAC.01361-09]

High Diversity of Extended-Spectrum beta-Lactamases in Escherichia coli Isolates from Italian Broiler Flocks

TREVISANI, MARCELLO;
2010

Abstract

We characterized 67 Escherichia coli isolates with reduced susceptibility to cefotaxime or ceftiofur obtained from healthy broilers housed in five Italian farms. The blaCTX-M-1, blaCTX-M-32 and blaSHV-12 beta-lactamase genes were identified on IncI1, IncN, or IncFIB plasmids. Considerable genetic diversity was detected among the extended-spectrum beta-lactamase (ESBL)-producing isolates, and we identified indistinguishable strains in unrelated farms and indistinguishable plasmids in genetically unrelated strains. The detection of highly mobile plasmids suggests a potential animal reservoir for beta-lactamase genes.
2010
High Diversity of Extended-Spectrum beta-Lactamases in Escherichia coli Isolates from Italian Broiler Flocks / V. Bortolaia; L. Guardabassi; M. Trevisani; M. Bisgaard; L. Venturi; A.M. Bojesen. - In: ANTIMICROBIAL AGENTS AND CHEMOTHERAPY. - ISSN 0066-4804. - STAMPA. - 54:(2010), pp. 1623-1626. [10.1128/AAC.01361-09]
V. Bortolaia; L. Guardabassi; M. Trevisani; M. Bisgaard; L. Venturi; A.M. Bojesen
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/88814
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