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http://dx.doi.org/10.15324/kjcls.2019.51.3.301

Molecular Detection of Virulence Factors in Carbapenem-Resistant Pseudomonas aeruginosa Isolated from a Tertiary Hospital in Daejeon  

Cho, Hye Hyun (Department of Biomedical Laboratory Science, Daejeon Institute of Science and Technology)
Publication Information
Korean Journal of Clinical Laboratory Science / v.51, no.3, 2019 , pp. 301-308 More about this Journal
Abstract
The emergence and spread of multidrug resistant (MDR) Pseudomonas aeruginosa is a critical problem worldwide. The pathogenesis of P. aeruginosa is due partly to the production of several cell-associated and extracellular virulence factors. This study examined the distribution of virulence factors and antimicrobial resistance patterns of carbapenem-resistant P. aeruginosa (CRPA) isolated from a tertiary hospital in Daejeon, Korea. Antimicrobial susceptibility testing was performed using the disk diffusion method, and PCR and DNA sequencing were performed to determine for the presence of virulence genes. In addition, the sequence type (ST) of MDR P. aeruginosa was investigated by multilocus sequence typing (MLST). Among 32 CRPA isolates, 14 (43.8%) were MDR and the major ST was ST235 (10 isolates, 71.4%). All isolates were positive for the presence of virulence genes and the most prevalent virulence genes were toxA, plcN, and phzM (100%). All isolates carried at least eight or more different virulence genes and nine (28.1%) isolates had 15 virulence genes. The presence of the exoU gene was detected in 71.4% of the MDR P. aeruginosa isolates. These results indicate that the presence of the exoU gene can be a predictive marker for the persistence of MDR P. aeruginosa isolates.
Keywords
ExoU gene; Multidrug-resistant; Virulence factor;
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