New Delhi metallo-beta-lactamase-1

New Delhi metallo-beta-lactamase-1 enzyme confers bacterial resistance to antibiotics of the carbepenem class, often considered "last resort" drugs for multidrug resistant bacteria. The gene to manufacture it can be horizontally transferred among different species of pathogenic bacteria.

First reported in Klebsiella pneumoniae, it has been reported in Acinetobacter baumanae, Escherichia coli, Citrobacter freundii, Enterobacter cloacae, and Morganella morganii.