Multidrug-resistant Klebsiella pneumoniae and Escherichia coli isolates harboring New Delhi metallo-?-lactamase (NDM-1) were isolated from a patient who had returned to Canada from India. The NDM-1 gene was found on closely related incompatibility group A/C type plasmids. The occurrence of NDM-1 in North America is a major public health concern.
Antimicrobial Resistance and Nosocomial Infections section, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Manitoba, Canada. michael.mulvey@phac-aspc.gc.ca