Table 3.

Interpretation of susceptible or resistant bacteria and the accepted range of MIC for the E. coli ATCC 25922 reference strain

Antibiotic	MIC interpretive criteria (µg/mL)		E. coli ATCC 25922. MIC (µg/mL)
	Susceptible (S)	Resistance (R)
Ampicillin (AMP)	≤4	≥16	4
Amoxyclav (AMC)	≤1	≥4	1
Amoxicillin (AMO)	≤64	≥128	64
Ciprofloxacin (CIP)	≤0.08	≥0.32	0.08
Chloramphenicol (CHL)	≤4	≥16	4
Erythromycin (ERY)	≤0.2	≥0.8	0.2
Cefuroxime (CEF)	≤4	≥16	4
Gentamicin (GEN)	≤0.2	≥0.8	0.2