TABLE 2.

Inhibition zone sizes (mm) by naturally occurring compounds against RGM strains in the disk diffusion assays^a

Strains	tCIN	CAR	CIT	GER	GEN	PHL	AMI
M. abscessus
MAB1	43	14	40	28	19	16	24
MAB4	33	16	40	40	17	15	23
MAB5	35	16	L	36	18	15	25
M. chelonae
MC4	55	12	L	32	32	29	40
MC6	L	L	41	L	21	32	29
MC7	L	14	L	L	22	22	16
M. fortuitum
MF1	30	14	22	20	17	19	16
MF3	54	13	27	21	21	22	20
MF6	15	13	30	26	17	21	21
M. smegmatis
ATCC 14468	42	44	44	26	16	18	30

^a tCIN, trans-cinnamaldehyde (99 mg/mL); CAR, carvacrol (39.2 mg/mL); CIT, citral (95 mg/mL); GER, geraniol (98 mg/mL); GEN, gentisaldehyde (50 mg/mL); PHL, phloroglucinaldehyde (50 mg/mL); AMI, amikacin (3 mg/mL). Liquid compounds were tested for their highest concentrations and solid compounds were tested for the stock solutions. “L” indicates the inhibition zone size larger than 60 mm. “-” indicates no inhibition. Paper disk diameter 8 mm; test volume 20 μL. M. smegmatis ATCC 14468 was a non-pathogenic RGM reference strain to test for comparison.