Biotyping of isolates of Pseudomonas aeruginosa isolated from human infections by RAPD and ERIC-PCR

Abstract

Pseudomonas aeruginosa is a significant mortality factor due to nosocomial infections in humans. P. aeruginosa has been known with severe infections, high incidence, and multiple drug resistance. The present study aims to rapidly diagnose and biotype the isolates of P. aeruginosa isolated from human infections in Shiraz hospitals and health centers. Ninety six different isolates were collected from skin, urine, sputum, blood, wound, central vein blood, body fluids and burn wounds between January 2016 and February 2017. After phenotypic confirmation, isolates were examined by PCR for molecular confirmation. Ninety three isolates were verified as P. aeruginosa in molecular analysis. Enterobacterial Repetitive Intergenic Consensus (ERIC) PCR and Random Amplified Polymorphic DNA (RAPD) were done for 67 isolates. In ERIC-PCR, the patterns obtained included 2-11 bands. The RAPD patterns obtained with primers 272 and 208 consisted of 3-11 and 1-12 bands respectively. Based on dice similarity coefficient of greater than 80%, 38, 45 and 38 groups were identified in ERIC, RAPD 272 and RAPD 208 respectively. The results showed that the isolates of P. aeruginosa have a high polymorphism apparently because of the high genetic variation.