Table 2.

Breakpoints of 30 antibiotics.

Antimicrobial Agent		MIC breakpoints (μg/ml)
		Susceptibility	Intermediate	Resistance
Macrolides	CLRa	⩽2	4	⩾8
	AZMc	⩽2	4	⩾8
Rifamycins	RIFa	-	-	>1
	RFBa	-	-	>2
Aminoglycosides	STRa	-	-	⩾5
	GENb	<=4	8	>=16
	KANa	-	-	⩾4
	TOBa	⩽2	4	⩾8
	NEOb	-	-	>=10
	AMKa	⩽16	32	⩾64
Fluoroquinolones	MXFa	⩽1	2	⩾4
	CIPa	⩽1	2	⩾4
	LVXa	⩽2	4	⩾8
Cephalosporin	FOXa	⩽16	32-64	⩾128
	CMZd	⩽16	32	⩾64
Tetracyclines	TCYb	<=4	8	>=16
	DOXa	⩽1	2-4	⩾8
	MNOa	⩽1	2-4	⩾8
Glycylcycline	TGCa	⩽1	2-4	⩾8
Sulfonamides	SOXa	⩽38	-	⩾76
Carbapenems	IMPa	⩽4	8-16	⩾32
Oxazolidinones	LNZa	⩽8	16	⩾32
Lincosamides	CLIb	<=0.5	1-2	>=4
Penicillins	OXAb	<=2	-	>=4
Polypeptides	TECb	<=8	16	>=32
	VANb	<=2	4-8	>=16
Others	CFZe	-	-	>1
	INHa	-	-	⩾1
	EMBa	-	-	⩾4
	ETHa	-	-	>5

a denotes the breakpoints coming from Susceptibility Testing of Mycobacteria, Nocardia, and Other Aerobic Actinomycetes; Approved Standard–Second Edition. CLSI document M24-A2.

b denotes the breakpoints coming from Performance Standards Antimicrobial Susceptibility Testing-27th Edition. CLSI document M100.

c, d, e denote the breakpoints coming from [18–20], respectively.

d, S, susceptible, I, intermediate susceptible, and R, resistant.