Piperacillin-Tazobactam Resistance Mechanisms in Escherichia coli and Identification of a CTX-M-255 β-Lactamase Selectively Conferring Resistance to Penicillin/β-Lactamase Inhibitor Combinations
M. R. Andreasen, K. Hartung Hansen, M. S. Pedersen, S. Mollerup, L. Jelsbak, K. Schonning
The paper identifies four resistance mechanisms in E. coli resistant to piperacillin-tazobactam but susceptible to third-generation cephalosporins, including a novel CTX-M-255 β-lactamase resistant to inhibitors.
bioRxiv · Sep 21, 2022 · PreprintMicrobiology