Table 2 Antimicrobial activities of the micro-algae ethanol extracts against bacter ia

Strains	Inhibition zone (mm)		MIC1) (mg/mL)
	CE2)	AE	CE	AE
	Gram negative
E. coli KACC 10115	ND3)	9.99±0.364)d5)	-	5
E. coli KACC 13964	7.76±0.50d	9.33±0.70ef	10	5
E. coli KACC 6017	7.17±0.03de	9.84±0.02d	10	10
E. coli KCTC 1039	6.81±0.04e	9.78±0.06de	10	10
P. aeruginosa KACC 10259	ND	9.70±0.58de	-	5
K. pnumoniae KCTC 2246	ND	10.74±0.25ab	-	5
Gram positive
M. luteous KACC 11307	ND	10.49±0.29bc	-	5
S. aureus KACC 1927	8.53±0.38c	9.32±0.13ef	10	5
L. monocytogenes KACC 10764	ND	10.91±0.08ab	-	10
B. subtilis KACC 10854	10.08±0.10b	11.14±0.04a	10	5
B. licheniformis KACC 10496	11.34±0.52a	9.93±0.16d	5	5
B. cereus KACC 10097	ND	10.20±0.13cd	-	5
B. cereus KACC 13066	ND	9.91±0.19d	-	5
B. cereus KACC 13064	ND	9.28±0.16f	-	5
B. cereus KACC 12682	ND	10.50±0.37bc	-	5
B. cereus KACC 12672	ND	9.00±0.02f	-	5

MIC, minimum inhibitory concentration.
CE, chlorella ethanol extract; AE, A. carterae ethanol extract.
ND, not detected.
Values are mean±SD (n=3).
Different small letters in the same column are significantly different by Duncan’s multiple test (p<0.05).