NDM-4-producing Klebsiella pneumoniae (NDM-4-KP) was detected from the patient who had previously been injured and hospitalized for 5 days in Vietnam in a neurosurgical intensive care unit (NSICU) of a Korean tertiary-care hospital in December 2016. He admitted with ventilator-associated pneumonia and NDM-4-KP was isolated, which was subsequently detected in two other NSICU patients. All NDM-4-KP isolates from patient and environmental surveillance cultures were sequence type 11. Colonization of three patients persisted for 5-12 months. Dedicated environmental cleaning was added to single room isolation of NDM-4-KP patients and universal chlorhexidine bathing, and no further transmission of NDM-4-KP occurred. This is the first report of NDM-4-KP in a Korean hospital where a patient with a history of hospitalization abroad was the index case initiating an outbreak involving three patients. The spread of newly introduced CPE was controlled using a bundle of infection control.
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