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. 2018 Jan 24;56(2):e01093-17. doi: 10.1128/JCM.01093-17

TABLE 1.

Interpretative criteria for ceftazidime-avibactam and ceftolozane-tazobactam^a

Agent	MIC (mg/liter)			Disk diffusion zone diam (mm)
Agent	S	I	R	S	I	R
Ceftazidime-avibactam	≤8/4		≥16/4	≥21		≤20
Ceftolozane-tazobactam	≤4/4	8/4	≥16/4	≥21	17–20	≤16

^a

S, susceptible; I, intermediate; R, resistant.