TABLE 2.

Recently approved CLSI broth microdilution quality control MIC ranges for ceftibuten, ceftibuten-avibactam, and ceftazidime-avibactam

QC strain tested	Recently approved CLSI broth microdilution QC range (μg/mL) (% in range; no. of dilutions)
	Ceftibuten	Ceftibuten-avibactam (fixed 4 μg/mL)	Ceftazidime-avibactam (fixed 4 μg/mL)
E. coli ATCC 25922		0.016/4–0.12/4 (100.0%; 4)
E. coli NCTC 13353		0.03/4–0.12/4 (100.0%; 3)	0.12/4–0.5/4 (100.0%; 3)
K. pneumoniae ATCC 700603	0.25–1 (99.2%; 3)	0.06/4–0.25/4 (98.8%; 3)
K. pneumoniae ATCC BAA-1705		0.03/4–0.25/4 (100.0%; 4)	0.25/4–2/4 (100.0%; 4)
K. pneumoniae ATCC BAA-2814		0.12/4–0.5/4 (99.6%; 3)	1/4–4/4 (100.0%; 3)