TABLE 1.

Cefiderocol minimum inhibitory concentration (MIC) of A. baumannii AMA22_1, A. lwoffii AMA23, and the isogenic mutant variants obtained within the inhibition ellipse zones of cefiderocol containing 4 µg/mL of sulbactam or 4–8 µg/mL avibactam, respectively, using gradient strips and microdilution assays^a

Strain	BMD
AMA22_1	2
AMA22_1R	4
AMA23	1
AMA23_4R	16
AMA23_8R	8

^a BMD: Broth microdilution using ID-CAMHB. All experiments were performed in triplicates.