Department of Veterinary Disease Biology, University of Copenhagen, Stigbøjlen 4, 1870 Frederiksberg C, Denmark.
Antimicrob Agents Chemother. 2010 Apr;54(4):1623-6. doi: 10.1128/AAC.01361-09. Epub 2010 Jan 25.
We characterized 67 Escherichia coli isolates with reduced susceptibility to cefotaxime or ceftiofur obtained from healthy broilers housed in five Italian farms. The bla(CTX-M-1), bla(CTX-M-32) and bla(SHV-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.
我们对来自意大利五个农场的健康肉鸡中分离出的 67 株对头孢噻肟或头孢噻呋敏感性降低的大肠杆菌进行了研究。bla(CTX-M-1)、bla(CTX-M-32)和 bla(SHV-12)β-内酰胺酶基因位于 IncI1、IncN 或 IncFIB 质粒上。在产生超广谱β-内酰胺酶(ESBL)的分离株中检测到相当大的遗传多样性,我们在没有关联的农场中发现了相同的菌株,在遗传上没有关联的菌株中发现了相同的质粒。高度移动质粒的检测表明β-内酰胺酶基因可能存在于动物库中。