Closing the Brief Case: IMP, the Uncommonly Common Carbapenemase.

1. How prevalent is the IMP carbapenemase in Gram-negative organisms in North America? Answer: a. Based on a CDC survey of the Antibiotic Resistance Lab Network in 2017, IMP was found in 0.4% of Enterobacterales tested. KPC was the most commonly identified carbapenemase (28%), followed by NDM (3.