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Year : 2008  |  Volume : 26  |  Issue : 2  |  Page : 163-166

Detection of Enterobacteriaceae producing CTX-M extended spectrum β-lactamases from a tertiary care hospital in south India


1 School of Biotechnology, Chemical and Biomedical Engineering, VIT University, Vellore - 632 014, Tamil Nadu, India
2 Department of Microbiology, PSG Institute of Medical Sciences & Research, Coimbatore - 641 004, Tamil Nadu, India
3 Central Research Institute, Government of India, Kasauli - 173 204, Himachal Pradesh, India

Correspondence Address:
S Baby Padmini
School of Biotechnology, Chemical and Biomedical Engineering, VIT University, Vellore - 632 014, Tamil Nadu
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0255-0857.40534

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A total of 23 clinical isolates (15 Escherichia coli and 8 Klebsiella pneumoniae ), resistant to cefotaxime and ceftazidime recovered during 2002 and 2003, were investigated for production of CTX-M extended spectrum β-lactamase (ESBL) by phenotypic and molecular methods. The presence of ESBL was tested by NCCLS phenotypic confirmatory test using cephalosporin/clavulanate combination discs and E-test ESBL strips. Determination of MIC of cefotaxime and ceftazidime was done with and without the presence of clavulanic acid by agar dilution technique. Polymerase chain reaction revealed the presence of CTX-M type ESBLs in 19 isolates. Further sequencing resulted in identification of CTX-M-15 ESBLs. This is the first report identifying CTX-M type ESBL from clinical isolates of E. coli and K. pneumoniae from a tertiary care hospital in south India.






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2004 - Indian Journal of Medical Microbiology
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