Molecular Characterization of an IncFIIk Plasmid Co-harboring blaIMP–26 and tet(A) Variant in a Clinical Klebsiella pneumoniae Isolate

Autor: Hong Yao, Jing Cheng, Aijuan Li, Runhao Yu, Wenbo Zhao, Shangshang Qin, Xiang-Dang Du
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: Frontiers in Microbiology, Vol 11 (2020)
Druh dokumentu: article
ISSN: 1664-302X
DOI: 10.3389/fmicb.2020.01610
Popis: Carbapenems and tigecycline are two important classes of antimicrobial agents to treat the infections caused by Enterobacterales. Here, we reported a plasmid carrying both blaIMP–26 and tet(A) variant in clinical Klebsiella pneumoniae KP-1572. MIC results showed that K. pneumonia KP-1572 was resistant to a wide range of antimicrobials. The blaIMP–26 and tet(A) variant were located on an identical plasmid, which was indicated by S1-PFGE and southern blotting hybridization and can be successfully transferred by electroporation. Whole-plasmid sequencing and analysis revealed that a 142,993-bp-sized plasmid, designated pIMP1572, contains an IncFIIk backbone and a variable region harboring blaIMP–26 and tet(A) variant. The plasmid pIMP1572 was apparently originated from a tet(A)-carrying IncFIIk plasmid but with a deletion length of 6,216-bp and a multiple drug resistance region (MDRR) insertion of 25,259 bp. The plasmid pIMP1572 in the present study represents the first report of the IncFIIk plasmid co-carrying blaIMP and tet(A) variant, which should be monitored.
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