Complete sequence of a F2:A-:B- plasmid pHN3A11 carrying rmtB and qepA, and its dissemination in China
文献类型： 外文期刊
作者： Chen, Xiaojie 1 ; He, Liangying 1 ; Li, Yugu 1 ; Zeng, Zhenling 1 ; Deng, Yuting 1 ; Liu, Yahong 1 ; Liu, Jian-Hua 1 ;
作者机构： 1.South China Agr Univ, Coll Vet Med, Guangzhou 510642, Guangdong, Peoples R China
2.Chinese Acad Sci, Guangzhou Inst Geochem, Ctr Pearl River Delta Environm Pollut & Control R, State Key Lab Organ Geochem, Guangzhou, Guangdong, Peoples R China
3.Chinese Acad Fishery Sci, Pearl River Fisheries Res Inst, Minist Agr, Key Lab Fishery Drug Dev, Guangzhou, Guangdong, Peoples R China
期刊名称：VETERINARY MICROBIOLOGY （ 影响因子：3.293； 五年影响因子：3.599 ）
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收录情况： SCI
摘要： Previous studies have confirmed that the spread of rmtB and qepA was mainly mediated by similar F2:A-:B-plasmids. In this study, a representative rmtB and qepA-harbouring F2:A-:B-plasmid, pHN3A11, originating from an Escherichia coli strain of feline origin, was fully sequenced and compared with other IncFll plasmids. pHN3A11 is 76,626 bp long with a backbone similar to that of the IncFlI plasmids obtained from China (pHK23a, pF0S-HK151325, pXZ) and Canada (pC15-1a). It contains genes encoding addiction (pemI/pemK, hok/mok/sok) and partitioning (parM, parB, and stbB) systems that promote plasmid maintenance during vertical transmission. rmtB, qepA, bla(TEM-1), and dfr were found in previously observed contexts, interspersed with different complete or truncated insertion sequences and transposons (Delta IS1, Delta Tn2, Delta intI1, ISCR3, 3 IS26, Tn21). Further analyses confirmed that pHN3A11-like plasmids have disseminated in E. coil isolates from pets, food animals and farm environments in China. The successful dissemination of F2:A-:B-type multidrug resistant plasmid among animals may represent a public health risk, and may further worsen the clinical impact. (C) 2014 Elsevier B.V. All rights reserved.
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