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Successful use of culture and enrichment for the detection of OXA-181-producing Escherichia coli from rectal swab samples falsely categorized as negative by Xpert® Carba-R
An OXA-181 producing Escherichia coli isolate that went recurrently undetected directly from rectal swab sample using Xpert® Carba-R, was successfully detected using ertapenem supplemented broth enrichment followed by culture-based method. Our data suggest that implementation of culture-based methods plus enrichment might be crucial for the efficient screening of patients considered to be at “high-risk” of colonization with carbapenemase producers and who are colonized at low level.