Use of ChromID Extended-Spectrum β-Lactamase Medium for Detecting Carbapenemase-Producing Enterobacteriaceae

Author:

Carrër Amélie1,Fortineau Nicolas1,Nordmann Patrice1

Affiliation:

1. Service de Bactériologie-Virologie, INSERM U914 Emerging Resistance to Antibiotics, Hôpital de Bicêtre, Assistance Publique/Hôpitaux de Paris, Faculté de Médecine Paris Sud, K.-Bicêtre, France

Abstract

ABSTRACT ChromID extended-spectrum β-lactamase (ESBL) culture medium is routinely used for screening ESBL producers. This medium was tested for detecting carbapenemase-producing Enterobacteriaceae isolates from a collection of reference strains and compared to the CHROMagar KPC culture medium previously evaluated for detecting KPC-producing isolates. Producers of IMP-, VIM-, and KPC-type carbapenemases with high levels of resistance to cephalosporins and to carbapenems were detected at 1 × 10 1 CFU/ml. The OXA-48 producers were not detected on ChromID ESBL medium unless coexpressing ESBLs, whereas carbapenemase-producing isolates with MICs of <4 μg/ml were not detected on CHROMagar KPC medium.

Publisher

American Society for Microbiology

Subject

Microbiology (medical)

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