Characterization of GMB-1, a novel metallo-β-lactamase (MBL) found in three different Enterobacterales species.

The finding of GMB-1 once again shows that novel carbapenemases continue to emerge and make their way into clinically relevant species. The occurrence of GMB-1 in three different species demonstrates the extraordinary mobility of such genetic islands and their potential to spread carbapenemase genes into diverse genetic environments.