TABLE 1.

Antimicrobial activity of FRPM against ESBL- and AmpC-producing Enterobacterales strains classified by phenotype (broth microdilution testing, n = 48)

Phenotype	No. (%) of strains at various MICs (mg/L)
	≤0.12	0.12	0.25	0.5	MIC50	MIC90	4	8	>8
ESBL+ AmpC− (n = 40)			1	14	19	6
ESBL+ AmpC+ (n = 4)								2	2
ESBL− AmpC+ (n = 4)					3	1
Total			1 (2)	14 (29)	22 (46)	7 (15)	0 (0)	2 (4)	2 (4)