Characterization of novel VIM carbapenemase, VIM-38, and first detection of GES-5 carbapenem-hydrolyzing β-lactamases in Pseudomonas aeruginosa in Turkey

Diagn Microbiol Infect Dis. 2014 Mar;78(3):292-4. doi: 10.1016/j.diagmicrobio.2013.12.003. Epub 2013 Dec 14.


Pseudomonas aeruginosa isolates were collected form a Turkish hospital. Antimicrobial susceptibility was performed using the Vitek 2 Compact system, and 24 isolates were categorized as multidrug resistant (n = 18), extensively-drug resistant (n = 5), or pan-drug resistant (n = 1). PCR and DNA sequence analysis revealed that 1 strain possessed the blaGES-5 and another carried a novel blaVIM variant, named VIM-38. This new gene exhibited 1 amino acid substitution (Ala265Val) in comparison to its closest variant, VIM-5. Both VIM encoding genes were clones and demonstrated similar susceptibility profile when expressed in identical background. The presence of VIM-38 increases the diversity of carbapenemases in Turkey.

Keywords: Carbapenemase; Class 1 integron; ESBL; Pseudomonas aeruginosa; β-lactamase.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amino Acid Substitution
  • Anti-Bacterial Agents / pharmacology
  • Bacterial Proteins / genetics*
  • Carbapenems / pharmacology
  • Cloning, Molecular
  • DNA, Bacterial / isolation & purification
  • Drug Resistance, Multiple, Bacterial / genetics*
  • Genes, Bacterial*
  • Humans
  • Microbial Sensitivity Tests
  • Pseudomonas aeruginosa / enzymology*
  • Pseudomonas aeruginosa / genetics
  • Pseudomonas aeruginosa / isolation & purification
  • Sequence Analysis, DNA
  • Turkey
  • beta-Lactamases / genetics*


  • Anti-Bacterial Agents
  • Bacterial Proteins
  • Carbapenems
  • DNA, Bacterial
  • beta-Lactamases
  • carbapenemase