Worldwide diversity of Klebsiella pneumoniae that produce beta-lactamase blaKPC-2 gene.
Worldwide diversity of Klebsiella pneumoniae that produce beta-lactamase blaKPC-2 gene.
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DOI:
10.3201/eid1609.091389
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发表时间:
2010-09
影响因子:
11.8
通讯作者:
Nordmann P
中科院分区:
文献类型:
--
作者:
Cuzon G;Naas T;Truong H;Villegas MV;Wisell KT;Carmeli Y;Gales AC;Venezia SN;Quinn JP;Nordmann P
TOC summary: Clones harboring different plasmids with identical genetic structure could be the origin of worldwide spread. Klebsiella pneumoniae isolates that produce carbapenemases (KPCs) are rapidly disseminating worldwide. To determine their genetic background, we investigated 16 blaKPC-2-harboring K. pneumoniae isolates from 5 countries. The isolates were multidrug resistant, possessed the blaKPC-2 gene, and differed by additional β-lactamase content. They harbored a naturally chromosome-encoded bla gene (blaSHV-1 [12.5%], blaSHV-11 [68.7%], or blaOKP-A/B [18.8%]) and several acquired and plasmid-encoded genes (blaTEM-1 [81.3%], blaCTX-M-2 [31.3%], blaCTX-M-12 [12.5%], blaCTX-M-15 [18.7%], and blaOXA-9 [37.5%]). The blaKPC-2 gene was always associated with 1 of the Tn4401 isoforms (a, b, or c). Tn4401 was inserted on different-sized plasmids that belonged to different incompatibility groups. Several blaKPC-containing K. pneumoniae clones were found: 9 different pulsotypes with 1 major (sequence type 258) and 7 minor distinct allelic profiles. Different clones harboring different plasmids but having identical genetic structure, Tn4401, could be at the origin of the worldwide spread of this emerging resistance gene.
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