J Med Microbiol 56 (2007), 52-55; DOI: 10.1099/jmm.0.46909-0
© 2007 Society for General Microbiology
ISSN 1473-5644
Real-time TaqMan PCR for rapid detection and typing of genes encoding CTX-M extended-spectrum ß-lactamases
Christopher I. Birkett1,
Hugo A. Ludlam1,
Neil Woodford2,
Derek F. J. Brown1,
Nicholas M. Brown1,
Mark T. M. Roberts1,
Nicola Milner1 and
Martin D. Curran1
1 Health Protection Agency, Clinical Microbiology and Public Health Laboratory, Addenbrooke's Hospital, Cambridge, UK
2 Antibiotic Resistance Monitoring and Reference Laboratory, Centre for Infections, Health Protection Agency, London, UK
Correspondence
Christopher I. Birkett
christopher.birkett{at}addenbrookes.nhs.uk
Received 22 August 2006
Accepted 22 September 2006
The prevalence of CTX-M-producing members of the Enterobacteriaceae is increasing worldwide. A novel, multiplex, real-time TaqMan PCR assay to detect and type blaCTX-M genes is described which is an improvement on previously described techniques with respect to reduced assay time, elimination of the need for protracted post-PCR processing and the convenience of a single reaction vessel. Based on ß-lactam antibiogram and MIC data, 478 of 1279 Enterobacteriaceae isolates from clinical blood and urine culture specimens were selected and tested for extended-spectrum ß-lactamase (ESBL) production using phenotypic methods. The new TaqMan assay detected and typed blaCTX-M genes in 21 of 28 ESBL-producing isolates.
Abbreviations: ESBL, extended-spectrum ß-lactamase.
Copyright © 2007 Society for General Microbiology.