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ROC curve analysis to define best inhibition zone size to define susceptibility to neomycin (according to MIC reference)
A value of 16.5mm of inhibition zone diameter corresponded to the best breakpoint regarding sensitivity and specificity to define S. aureus susceptibility to neomycin by disk diffusion technique, using a 30µg neomycin disk. ** the Area Under Curve (AUC) was calculated as 0.942 (CI 95% 0.895 to 0.989. p<.0001)
