Table 4. Extended Screening on Inducible Resistance to Clarithromycin (CLA).

NTM species		Day 3	Day 5	Day 14
M. abscessus	MIC* range	≤ 0.06 to 1	≤ 0.06 to 4	≤ 0.06 to > 32
	MIC90 #	0.5	4	> 32
	%R※	0	0	69.3
M. massiliense	MIC range	≤ 0.06	≤ 0.06 to 0.125	≤ 0.06 to 0.125
	MIC90	≤ 0.06	0.125	0.125
	%R	0	0	0

CLA break points (S, I, R):(2,4,8) (μg/mL) (S, I, R: susceptible, intermediate susceptible and resistant)

*MIC(μg/mL): minimum inhibitory concentration

^※%R: percentage of resistance to antibiotics

^#MIC₉₀: MIC required to inhibit the growth of 90% of the organism