MMWR Vol. 65 / Early Release ► Investigation of First Identified mcr-1 Gene in an Isolate from a U.S. Patient — Pennsylvania, 2016 | MMWR

Investigation of First Identified mcr-1 Gene in an Isolate from a U.S. Patient — Pennsylvania, 2016 | MMWR

MMWR Early Release Early Release September 9, 2016

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Investigation of First Identified mcr-1 Gene in an Isolate from a U.S. Patient — Pennsylvania, 2016 Kelly E. Kline, MPH; Jordan Shover; Alexander J. Kallen, MD; et al. MMWR Morb Mortal Wkly Rep 2016;65(Early Release) In May 2016, mcr-1-positive Escherichia coli was first isolated from a specimen from a U.S. patient when a Pennsylvania woman was evaluated for a urinary tract infection. Although it is not known how the patient became colonized, as more surveillance systems with broader testing are established, it is anticipated that mcr-1 will be identified with increasing frequency.