Three prolonged outbreaks of metallo-β-lactamase-producing in an Upper Austrian hospital, 2017-2023.

Unlabelled: In spring 2022, an increase in metallo-β-lactamase-producing (MBL-Pa) infections was detected in a hospital in Upper Austria. To identify the source of infection and to stop further transmissions, an epidemiological outbreak investigation including whole-genome sequencing (WGS)-based typing was conducted. The final case definition included cases admitted to the hospital between 2020 and 2023 with an MBL-Pa in one of the three genomic clusters identified.