TABLE 2.

In vitro activity of sulbactam-durlobactam against resistant subsets of ABC baseline isolates from ATTACK^a

Category	ABC baseline isolates, N (%)	SUL-DUR MIC range (µg/mL)	SUL-DUR MIC50/90 (µg/mL)
ALL	175 (100)	0.25–16	2/4
CARB-R	168 (96)	0.5–16	2/4
MDR	168 (96)	0.5–16	2/4
XDR	148 (85)	0.5–16	2/4
PDR	26 (15)	1–8	2/4

^a CARB‑R = carbapenem-resistant (MIC > 4 µg/mL); MDR = non-susceptible to at least three different antibiotic classes used to treat ABC; PDR = non-susceptible to all tested antibiotic classes approved for use to treat ABC; XDR = non‑susceptible to all but two antibiotic classes approved for use to treat ABC (13). Sulbactam-durlobactam was tested as a titration of sulbactam in the presence of 4 µg/mL durlobactam.