Fig. 10
From: Drug susceptibility testing of Nocardia spp. using the disk diffusion method
Distribution of Nocardia isolates (n = 134) according to the inhibition diameter (mm) measured around the ciprofloxacin disk and their minimal inhibitory concentration (MIC) for ciprofloxacin determined by broth microdilution using Sensititre™ Myco RAPMYCOI after 72 h incubation. Shades of green: strains categorized as susceptible; orange: strains categorized as intermediate; shades of red: strains categorized as resistant according to Clinical Laboratory Standard Institute critical concentrations. Bold dotted line: critical inhibition diameter according to Youden index = 25 mm (inhibition diameter ≤ 25: ciprofloxacin I or R; inhibition diameter > 25: ciprofloxacin S). Solid bold line: the point closest to the upper left-hand corner of the ROC curve (ROC01) = 27 mm (inhibition diameter ≤ 27: ciprofloxacin I or R; inhibition diameter > 27: ciprofloxacin S)