Characterization of Multidrug Resistant ESBL-Producing Escherichia coli Isolates from Hospitals in Malaysia

Lim, K.T. and Yasin, R. and Yeo, C.C. and Puthucheary, S.D. and Thong, Kwai Lin (2009) Characterization of Multidrug Resistant ESBL-Producing Escherichia coli Isolates from Hospitals in Malaysia. Journal of Biomedicine and Biotechnology, 2009 (165637). pp. 1-10. ISSN 1110-7243,

Lim_et_al.,_2009_(3).pdf - Published Version

Download (479kB)


The emergence of Escherichia coli that produce extended spectrum β-lactamases (ESBLs) and are multidrug resistant (MDR)poses antibiotic management problems. Forty-seven E. coli isolates from various public hospitals in Malaysia were studied. All isolates were sensitive to imipenem whereas 36 were MDR (resistant to 2 or more classes of antibiotics). PCR detection using gene-specific primers showed that 87.5% of the ESBL-producing E. coli harbored the blaTEM gene. Other ESBL-encoding genes detected were blaOXA, blaSHV, and blaCTX-M. Integron-encoded integrases were detected in 55.3% of isolates, with class 1 integron encoded intI1 integrase being the majority. Amplification and sequence analysis of the 5�CS region of the integrons showed known antibiotic resistance-encoding gene cassettes of various sizes that were inserted within the respective integrons. Conjugation and transformation experiments indicated that some of the antibiotic resistance genes were likely plasmid-encoded and transmissible. All 47 isolates were subtyped by PFGE and PCR-based fingerprinting using random amplified polymorphic DNA (RAPD), repetitive extragenic palindromes (REPs), and enterobacterial repetitive intergenic consensus (ERIC). These isolates were very diverse and heterogeneous. PFGE, ERIC, and REP-PCR methods were more discriminative than RAPD in subtyping the E. coli isolates.

Item Type: Article
Funders: Malaysian Ministry of Science, Technology and Innovation (MOSTI), Malaysian Toray Science Foundation, University of Malaya
Subjects: Q Science > QR Microbiology
Divisions: Faculty of Science > Institute of Biological Sciences
Depositing User: Prof. Dr Kwai Lin Thong
Date Deposited: 24 Jan 2014 16:01
Last Modified: 15 Oct 2018 04:19

Actions (login required)

View Item View Item