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IMP-38-Producing High-Risk Sequence Type 307 Klebsiella pneumoniae Strains from a Neonatal Unit in China.
mSphere ( IF 4.8 ) Pub Date : 2020-07-01 , DOI: 10.1128/msphere.00407-20 Siyi Wang 1 , Juan Zhao 1 , Ning Liu 1 , Fang Yang 1 , Yiming Zhong 1 , Xiumei Gu 1 , Zijuan Jian 1 , Qun Yan 1 , Qingxia Liu 1 , Hongling Li 1 , Yanming Li 1 , Jing Liu 2 , Hui Li 2 , Liang Chen 3, 4 , Wenen Liu 5
mSphere ( IF 4.8 ) Pub Date : 2020-07-01 , DOI: 10.1128/msphere.00407-20 Siyi Wang 1 , Juan Zhao 1 , Ning Liu 1 , Fang Yang 1 , Yiming Zhong 1 , Xiumei Gu 1 , Zijuan Jian 1 , Qun Yan 1 , Qingxia Liu 1 , Hongling Li 1 , Yanming Li 1 , Jing Liu 2 , Hui Li 2 , Liang Chen 3, 4 , Wenen Liu 5
Affiliation
An emerging multidrug-resistant Klebsiella pneumoniae high-risk clone of sequence type 307 (ST307) has been increasingly reported worldwide. Here, we described the genomic characteristics of an IMP-38-producing ST307 K. pneumoniae strain and investigated the prevalence of blaIMP-38 among carbapenem-resistant Klebsiella pneumoniae isolates from a tertiary care hospital in central China. A total of 14 IMP-38-producing ST307 K. pneumoniae strains were identified from 2013 to 2016, with 13 strains isolated from patients with neonatal sepsis in the neonatal ward. PacBio and Illumina whole-genome sequencing analysis performed on a representative IMP-38-producing K. pneumoniae strain, WCGKP294, showed that it contained a circular chromosome and two plasmids. Carbapenemase gene blaIMP-38 is colocated with blaCTX-M-3 in transposon Tn6382 on an IncHI5 plasmid (pWCGKP294-2). WCGKP294 harbors another IncFIB plasmid, pWCGKP294-1, carrying three copies of tandem-repeated IS26-blaSHV-2A-deoR-ygbJ-ygbK-fucA-IS26 composite transposon elements. Phylogenetic analysis placed WCGKP294 in the global ST307 cluster, distant from the U.S. (Texas) and South Africa clusters. Nevertheless, WCGKP294 does not contain the chromosomal fluoroquinolone resistance-associated mutations and IncFIIK/IncFIBK plasmid-associated blaCTX-M-15 gene that are frequently found in other global ST307 strains.
更新日期：2020-07-01
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