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  • Title: Evaluation of a double synergy differential test (DSDT) for differential detection of ESBL and AmpC-type β-lactamases in Escherichia coli, Klebsiella pneumoniae and Proteus mirabilis.
    Author: Sabia C, Gargiulo R, Sarti M.
    Journal: New Microbiol; 2012 Apr; 35(2):221-5. PubMed ID: 22707136.
    Abstract:
    This work describes a simple and practical double synergy differential test (DSDT) that couples the detection of ESBLs and AmpC-type enzymes by means of a combo-disk approach using cefotaxime and ceftazidime as indicator substrates, and clavulanate and boronic acid as enzyme inhibitors. The DSDT was tested with a collection of 118 Escherichia coli, Klebsiella pneumoniae and Proteus mirabilis strains with different beta-lactamase profiles, and proved to be highly sensitive and specific for the detection of ESBL and AmpC-producing isolates.
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