Carbapenems are vital last-resort antibiotics against multidrug-resistant infections, but their effectiveness is threatened by the global rise of carbapenem-resistant bacteria due to carbapenemase genes.
In Canada, a specific carbapenemase type has been identified as prevalent, capable of breaking down various antibiotics, and commonly found on mobile genetic elements like plasmids and transposons.
Through whole genome sequencing of 829 carbapenemase-producing isolates from 2010 to 2021, researchers discovered diverse plasmid clusters responsible for resistance spread, revealing both clonal and horizontal transmission patterns across different bacterial strains in Canada.