Development and validation of a pentaplex PCR assay for rapid detection of bla bla, bla bla and the PBP3 insert in Enterobacterales.

Background: There is a high diversity of beta-lactamases in gram negative pathogens, making them difficult to treat. In the presence of OXA-1 and ampC, PTZ is no longer clinically relevant when treating Enterobacterales expressing ESBLs. Further, MBL infections are often treated with the combination of ceftazidime/avibactam with aztreonam.