Poirel, L., Palmieri, M., Brilhante, M., Masseron, A., Perreten, V., & Nordmann, P. (2020). PFM-Like Enzymes Are a Novel Family of Subclass B2 Metallo-β-Lactamases from Pseudomonas synxantha Belonging to the Pseudomonas fluorescens Complex. Antimicrobial Agents and Chemotherapy, 64(2). https://doi.org/10.1128/aac.01700-19
A carbapenem-resistant Pseudomonas synxantha isolate recovered from chicken meat produced the novel carbapenemase PFM-1. That subclass B2 metallo-β-lactamase shared 71% amino acid identity with β-lactamase Sfh-1 from Serratia fonticola. The blaPFM-1 gene was chromosomally located and likely acquired. Variants of PFM-1 sharing 90% to 92% amino acid identity were identified in bacterial species belonging to the Pseudomonas fluorescens complex, including Pseudomonas libanensis (PFM-2) and Pseudomonas fluorescens (PFM-3), highlighting that these species constitute reservoirs of PFM-like encoding genes.
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