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Carbapenem-resistant Enterobacteriaceae (CRE) isolates submitted to the MDH-PHL for further characterization according to the MDH CRE definition. Isolates were collected between February 2009 and December 2013. Other species of CRE (e.g., Citrobacter spp.) submitted for additional testing were excluded. Whole-genome sequencing (WGS) was performed subsequently on a subset of CRE isolates (40 E. cloacae and 4 E. coli isolates) for this study.
