alexa How to detect NDM-1 producers.
Medicine

Medicine

Internal Medicine: Open Access

Author(s): Nordmann P, Poirel L, Carrr A, Toleman MA, Walsh TR

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Abstract Enterobacterial isolates expressing the carbapenemase NDM-1 are emerging worldwide. Twenty-seven NDM-1-positive isolates of worldwide origin were included in this study to identify these strains as not only pathogens but also colonizers of normal flora for infection control screening. Although susceptibility to carbapenems varied, a combined test (IMP/IMP + EDTA), the Etest MBL, and automated susceptibility testing by Vitek2 (bioMérieux) identified those NDM-1 producers as verified by PCR using specific primers. Screening for carriers of NDM-1 producers may be based on media such as the ChromID ESBL culture medium routinely used to screen for extended-spectrum β-lactamase producers, which gives excellent detection levels with low limits of detection ranging from 8 × 10(0) to 5 × 10(2) CFU/ml. The CHROMagar KPC culture medium had higher limits of detection (1 × 10(1) to 5 × 10(5) CFU/ml) and may be proposed for the follow-up of outbreaks of infections with NDM-1 producers. Colonies growing on these screening media can be verified as NDM-1 producers with molecular methods as described herein.
This article was published in J Clin Microbiol and referenced in Internal Medicine: Open Access

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