Table 1.

Antibacterial activity (MIC, MBC/MIC ratio) and cytotoxicity (CC₅₀ as fibroblast activity and selectivity index SI) caused by burdock root samples.

Sample	S. aureus ATCC 25923				S. epidermidis ATCC 12228				P. acnes PCM 2334				P. acnes PCM 2400				E. coli ATCC 25992				P. aeruginosa ATCC
	MIC	MBC MIC	CC50	SI	MIC	MBC MIC	CC50	SI	MIC	MBC MIC	CC50	SI	MIC	MBC MIC	CC50	SI	MIC	MBC MIC	CC50	SI	MIC	MBC MIC	CC50	SI
Br-f	500	8	>10	>20	500	8	>10	>20	250	4	>10	>40	500	4	>10	>20	>2000	-	>10	-	>2000	-	>10	-
Br-p	250	4	>10	>40	250	4	>10	>40	31.25	2	>10	>320	62.5	2	>10	>160	>2000	-	>10	-	>2000	-	>10	-

Br-f: burdock root samples after initial separation, Br-p: burdock root final peptide sample. MIC (µg/mL); MBC/MIC ratio, CC ₅₀ (mg/mL), SI.