TABLE 2

Zone diameter and MIC quality control ranges for polymyxins according to CLSI guidelines

StrainZone diam (mm) rangeMIC (μg/ml) range
ColistinPolymyxin BColistinPolymyxin B
E. coli ATCC 2592211–1713–190.25–20.25–2
P. aeruginosa ATCC 2785311–1714–180.5–40.5–2