Initial Assessment of the Molecular Epidemiology of blaNDM-1 in Colombia

Antimicrob Agents Chemother. 2016 Jun 20;60(7):4346-50. doi: 10.1128/AAC.03072-15. Print 2016 Jul.

Abstract

We report complete genome sequences of four blaNDM-1-harboring Gram-negative multidrug-resistant (MDR) isolates from Colombia. The blaNDM-1 genes were located on 193-kb Inc FIA, 178-kb Inc A/C2, and 47-kb (unknown Inc type) plasmids. Multilocus sequence typing (MLST) revealed that these isolates belong to sequence type 10 (ST10) (Escherichia coli), ST392 (Klebsiella pneumoniae), and ST322 and ST464 (Acinetobacter baumannii and Acinetobacter nosocomialis, respectively). Our analysis identified that the Inc A/C2 plasmid in E. coli contained a novel complex transposon (Tn125 and Tn5393 with three copies of blaNDM-1) and a recombination "hot spot" for the acquisition of new resistance determinants.

MeSH terms

  • Acinetobacter / drug effects
  • Acinetobacter / enzymology
  • Acinetobacter / genetics
  • Acinetobacter baumannii / drug effects
  • Acinetobacter baumannii / enzymology*
  • Acinetobacter baumannii / genetics*
  • Colombia
  • DNA, Bacterial / genetics
  • Drug Resistance, Bacterial / genetics
  • Escherichia coli / drug effects
  • Escherichia coli / enzymology
  • Escherichia coli / genetics
  • Klebsiella pneumoniae / drug effects
  • Klebsiella pneumoniae / enzymology
  • Klebsiella pneumoniae / genetics
  • Microbial Sensitivity Tests
  • Molecular Epidemiology / methods*
  • Multilocus Sequence Typing
  • Plasmids / genetics

Substances

  • DNA, Bacterial