TABLE 3.

In vitro susceptibility of 175 ABC baseline isolates in ATTACK to sulbactam, durlobactam, and imipenem alone or in combination^a

Antibacterial agent or combination	MIC range (µg/mL)	MIC50 (µg/mL)	MIC90 (µg/mL)
Sulbactam	0.25 to >64	32	64
Durlobactam	0.25 to >64	64	>64
Sulbactam-durlobactam	0.25–32	2	4
Imipenem	0.12 to >64	64	>64
Imipenem-durlobactam	0.12–64	16	32
Sulbactam-imipenem (1:1)	0.12–64	16	32
Sulbactam-imipenem (1:1) + durlobactam	0.12–16	1	4

^a Durlobactam was held at a fixed concentration of 4 µg/mL in all combinations tested.