Molecular Characterization of Extended Spectrum Beta-Lactamases (Esbls) Carbapenem-Resistant Genesin Klebsiella Pneumoniae Isolated From Iranian Hospital



Yaghoubi S¹ ; Yavari S² ; Baseri Z³ ; Abdollahpouralitappeh M⁴ ; Dezhkam A¹ ; Erfani Y⁵ Show Affiliations
Source: Pakistan Journal of Medical and Health Sciences Published:2020

Abstract

Background-Carbapenem-resistant Klebsiella isolates are describedas one of the most significant problemsworldwide. The aim of this study was to determinethe prevalence of extended spectrum beta-lactamase (ESBL)subtypes and carbapenem-resistant genes inKlebsiellapneumoniae(K. pneumonia) speciesisolatedfrom patients at Shariatee Hospital in Tehran, Iran. Methods: Fifty isolates of K. pneumoniae were isolated and identified from Shariatee Hospital in Tehran from January 2014 to February 2016. Disk diffusion and E-test minimum inhibitory concentration (MIC) testing methods were carried out to characterize the isolates.Modified Hodge Testing (MHT) and carbapenem inactivation method test (CIM), was used to confirm carbapenemase activity.Finally, Sequencing and polymerase chain reaction (PCR) was applied for further analysis. Results: Our findings showed that the prevalence of blaCTX-M 33 (63.46%) genes was the most prevalent ones. blaCTX-M15 19 (36.53%)was found to be the most commonly detected subtype in CTX-M groups.blaKPC, blaOXA-48, and blaNDM1 were detected in 3 (5.76%), 6 (11.53%), and 12 (23.7%) of the carbapenem-resistant isolates, respectively. Conclusions: Our studydisplayed that the CIM test has a great potential to detect carbapenem-resistant Klebsiella (CRK). Based on our results,there are a need for further considerations regarding the emergence anddiagnosis of isolates harboring ESBL subtypes and carbapenem genes. Further attention should be paidfor the treatment of patients with highlyresistant-isolates. © 2020 Lahore Medical And Dental College. All rights reserved.