Skip to main content
padlock icon - secure page this page is secure

Molecular Detection of TEM, SHV and CTX-M Genes Among Gram-negative Klebsiella Isolates

Buy Article:

$68.00 + tax (Refund Policy)

Introduction: In the past few years, the use of antimicrobial drugs against a wide range of pathogens has increased significantly. This extensive use of drugs has increased the resistance rate in microbial community widely. Molecular techniques for the detection of resistance are more reliable as compared to the conventional phenotypic method.

Background: The family Enterobacteriaceae is considered to be an important cause of nosocomial infections due to its predominantly active species such as E. coli, Klebsiella and Pseudomonas. These organisms are mainly involved in causing pneumonia, sepsis, post-surgical and urinary tract infections. Resistance against antimicrobial drugs among these isolates is increasing more rapidly all over the world. This study primarily focuses on the resistant isolates of Klebsiella species. The drug resistance in Klebsiella isolates is found to be associated with the production of resistance enzymes such as beta lactamase and extended spectrum beta lactamase (ESBLs) which confer resistance, most specifically against cephalosporins and extended spectrum cephalosporins. Since these enzymes are plasmid mediated, they can also produce resistance against several other antimicrobials. It has been found that among the genus Klebsiella, ESBLs are more prevalent in K. pneumoniae followed by K. oxytoca.

Methods: In this study, we estimated the distribution of ESBL producers among Klebsiella species and performed their genetic characterization. A total of 236 gram-negative isolates were collected from different microbiological laboratories, during the period January 2010 till January 2012. Among these gram-negative isolates, 125 were identified as Klebsiella species. After species identification, Kirby Bauer disk diffusion method was used for antimicrobial susceptibility profiling. Furthermore, the phenotypic detection of ESBL producers was performed by double disc synergy and combination disc methods. Resistance genes responsible for the production of beta lactamase and extended spectrum beta lactamase enzymes were detected by Polymerase chain reaction. DNA sequencing was performed by selecting an ESBL producing Klebsiella pneumoniae strain with a positive blaTEM gene.

Results: In this study, we found 48%, 43.2% and 2.4% of SHV, TEM, and CTX-M resistance genes respectively in Klebsiella isolates. The DNA sequence ESBL and blaTEM positive Klebsiella strain showed 94% similarity with Klebsiella pneumoniae KUN5033 blaTEM gene for class A beta-lactamase TEM-198 analyzed by the Basic Local Alignment Search Tool (BLAST).

Conclusion: Since there is an intense need of research in the field of drug resistance for implementing strict antibiotic control policies in hospitals, health care centers, laboratories, etc., the present study is dedicatedly conducted to estimate the drug resistant Klebsiella isolates, specifically the Beta lactamase and Extended Spectrum Beta Lactamase producers, at molecular level.
No References
No Citations
No Supplementary Data
No Article Media
No Metrics

Keywords: CTX-M; ESBL; SHV; TEM; drug-resistance; klebsiella

Document Type: Research Article

Publication date: March 1, 2018

This article was made available online on January 8, 2018 as a Fast Track article with title: "Molecular Detection of TEM, SHV and CTX-M Genes Among Gram-negative Klebsiella Isolates".

More about this publication?
  • The aim of Current Drug Delivery is to publish peer-reviewed articles, short communications, short and in-depth reviews in the rapidly developing field of drug delivery. Modern drug research aims to build in delivery properties of a drug at the design phase, however in many cases this ideal cannot be met and the development of delivery systems becomes as important as the development as the drugs themselves.

    The journal aims to cover the latest outstanding developments in drug and vaccine delivery employing physical, physico-chemical and chemical methods. The drugs include a wide range of bioactive compounds from simple pharmaceuticals to peptides, proteins, nucleotides, nucleosides and sugars. The journal will also report progress in the fields of transport routes and mechanisms including efflux proteins and multi-drug resistance.

    The journal is essential for all pharmaceutical scientists involved in drug design, development and delivery.
  • Editorial Board
  • Information for Authors
  • Subscribe to this Title
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more