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. 2008 Oct;14(10):973-7.
doi: 10.1111/j.1469-0691.2008.02065.x.

Evaluation of a new meropenem-EDTA double-ended Etest strip for the detection of the cfiA metallo-beta-lactamase gene in clinical isolates of Bacteroides fragilis

P Bogaerts  1 , A Engelhardt, C Berhin, L Bylund, P Ho, A Yusof, Y Glupczynski
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Free article

Evaluation of a new meropenem-EDTA double-ended Etest strip for the detection of the cfiA metallo-beta-lactamase gene in clinical isolates of Bacteroides fragilis

P Bogaerts et al. Clin Microbiol Infect. 2008 Oct.
Free article

Abstract

Thirty-five Bacteroides fragilis clinical isolates with varying susceptibility to meropenem were analysed with a prototype of a double-ended Etest strip containing meropenem +/- EDTA, designed for the detection of the CfiA metallo-beta-lactamase. Phenotypic results obtained with this new Etest strip were related to the genotype and compared to the results of the Etest containing imipenem +/- EDTA. Whereas the Etest with imipenem +/- EDTA only allowed detection of isolates with high-level resistance (both MICs of imipenem and meropenem >32 mg/L), reflecting the possible underestimation of CfiA prevalence in B. fragilis, the Etest with meropenem +/- EDTA proved to be more accurate, particularly for isolates with low-level carbapenem resistance, suggesting its potential for broader detection of CfiA production.

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