The global distribution and spread of the mobilized colistin resistance gene mcr-1.

The global distribution and spread of the mobilized colistin resistance gene mcr-1.
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DOI:
10.1038/s41467-018-03205-z
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发表时间:
2018-03-21
影响因子:
16.6
通讯作者:
Balloux F
Balloux F
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Wang R;van Dorp L;Shaw LP;Bradley P;Wang Q;Wang X;Jin L;Zhang Q;Liu Y;Rieux A;Dorai-Schneiders T;Weinert LA;Iqbal Z;Didelot X;Wang H;Balloux F

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粘菌素是治疗碳青霉烯类耐药肠杆菌科细菌感染的少数可用药物之一。因此,最近质粒介导的粘菌素耐药基因mcr-1的传播构成了重大的公共卫生威胁,需要全球监测和监督。在此,我们使用457个mcr-1阳性测序分离株的数据集来描述mcr-1的全球分布。我们发现mcr-1存在于各种质粒类型中,但确定了所有mcr-1序列共有的直接背景。我们的分析确定,循环中的所有mcr-1元素都来自2000年代中期ISApl1转座子对mcr-1的相同初始动员(2002 - 2008; 95%最高后验密度),随后是显著的人口扩张,导致其目前的全球分布。我们的研究结果首次对mcr-1的起源和传播进行了系统的系统发育分析,并强调了了解抗生素耐药基因在多个基因组组织水平上的运动的重要性。最近质粒介导的动员粘菌素耐药基因mcr-1的传播构成了重大的公共卫生威胁,需要在全球范围内进行监测和监督。在此,Wang et al.编辑并分析了457株mcr-1阳性测序分离株的数据集,以研究mcr-1的起源和全球分布。
Colistin represents one of the few available drugs for treating infections caused by carbapenem-resistant Enterobacteriaceae. As such, the recent plasmid-mediated spread of the colistin resistance gene mcr-1 poses a significant public health threat, requiring global monitoring and surveillance. Here, we characterize the global distribution of mcr-1 using a data set of 457 mcr-1-positive sequenced isolates. We find mcr-1 in various plasmid types but identify an immediate background common to all mcr-1 sequences. Our analyses establish that all mcr-1 elements in circulation descend from the same initial mobilization of mcr-1 by an ISApl1 transposon in the mid 2000s (2002–2008; 95% highest posterior density), followed by a marked demographic expansion, which led to its current global distribution. Our results provide the first systematic phylogenetic analysis of the origin and spread of mcr-1, and emphasize the importance of understanding the movement of antibiotic resistance genes across multiple levels of genomic organization. The recent plasmid-mediated spread of the mobilized colistin resistance gene mcr-1 poses a significant public health threat, requiring worldwide monitoring and surveillance. Here, Wang et al. compile and analyze a data set of 457 mcr-1-positive sequenced isolates to investigate the origin and global distribution of mcr-1.
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