Fig. 3.

Fig. 3. MALDI-TOF spectra of imipenem hydrolysis assays after a 20-min incubation at 37℃. Peaks of interest in gray represent the imipenem peak at 300 Da and its metabolite at 254 Da. (A) Imipenem, (B) cephalosporinase, (C) ESBL, (D) OXA-48, (E) KPC, (F) NDM.

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