The frequency of blaIMP and blaVIM carbapenemase genes in clinical Isolates of pseudomonas aeruginosa in Isfahan medical centers

This study aimed to investigate the discovery of antibiotic resistance in isolates of Pseudomonas aeruginosa and antibiotic susceptibility patterns and also, identify the gene encoding beta-lactamase in the isolated strains, isolated from nosocomial infections in patients admitted to the hospitals of Isfahan province.
In this cross-sectional study, 51 isolates of Pseudomonas aeruginosa were collected from patients in various hospitals and clinical laboratories in North, South and Central Isfahan. Then, antibiotic susceptibility of isolates was determined, using standard methods and disk diffusion method. The carbapenemase genes of blaVIM and blaIMP were detected by PCR test.
Clinical isolates of Pseudomonas aeruginosa were most resistant to ciprofloxacin (96/08 %), carbenicillin (92/16%), imipenem (80 %), ampicillin (72/55%) and nitrofurantoin (78/43%), respectively. On the other hand, among the highest rates of infection by Pseudomonas aeruginosa were wounds, by the rate of %33/33 . Of 51 cases with drug resistance, 32 strains (63%) had beta-lactamase-producing blaIMP gene , while none of the gene were blaVIM.
The results of this study showed that resistance to antibiotics among strains of Pseudomonas aeruginosa isolated from patients, were prevalent. Therefore, fast and precise evaluation of antibiotic resistance is necessary, because the strains producing beta-lactamase, among hospital strains are on the rise.