Table-2.

Total phenolic content and inhibition zones by herb and extract solvent type.

Extract by solvent and concentration	Total phenolic content, GAE mg/100 g (+/-SD)	Inhibition zone by extract type, mm (±SD)
		S. aureus V256	S. aureus ATCC	E. coli V252	E. coli V4	E. coli ATCC	S. agalactiae V171	S. uberis V243	S. liquefaciens V251
Oak bark
Ethanol 30	3399 (269)	27.3 (0.9)	26.0 (2.2)	12.0 (1.4)	11.5 (0.6)	10.5 (1.0)	10.3 (0.5)	10.5 (0.6)	0.0 (0.0)
Ethanol 50	3920 (169)	26.8 (2.5)	24.5 (2.1)	12.3 (0.5)	11.3 (1.3)	10.25 (1.7)	10.5 (0.6)	10.5 (0.6)	0.0 (0.0)
Ethanol 70	5462 (410)	25.5 (0.6)	22.0 (3.2)	11.5 (0.6)	10.7 (0.6)	9.8 (2.1)	10.8 (0.5)	10.8 (0.5)	0.0 (0.0)
Acetone 30	2809 (997)	26.5 (1.9)	26.0 (1.4)	12.3 (1.5)	12.5 (0.6)	11.8 (1.3)	10.0 (0.0)	10.0 (0.0)	0.0 (0.0)
Acetone 50	4201 (1061)	25.3 (1.5)	22.3 (1.3)	11.0 (0.8)	10.8 (0.5)	9.7 (0.9)	10.0 (0.0)	10.0 (0.0)	0.0 (0.0)
Acetone 70	4374 (1015)	21.8 (1.0)	22.0 (1.0)	10.5 (1.0)	11.0 (0.8)	11.3 (1.6)	10.0 (0.0)	11.8 (1.0)	10.0 (0.0)
Heather herb
Ethanol 30	2755 (349)	25.3 (2.2)	18.8 (1.5)	10.5 (1.0)	13.8 (0.9)	10.5 (1.0)	10.5 (1.0)	11.5 (0.6)	11.3 (0.5)
Ethanol 50	3069 (879)	23.5 (1.9)	19.3 (1.7)	10.0 (0.0)	12.5 (0.9)	0.0 (0.0)	10.5 (0.6)	10.0 (0.8)	9.8 (1.3)
Ethanol 70	4368 (351)	20.5 (3.3)	15.5 (1.0)	0.0 (0.0)	9.0 (0.8)	10.0 (1.6)	10.8 (0.5)	0.0 (0.0)	9.3 (0.3)
Acetone 30	3210 (1037)	24.5 (2.1)	18.5 (1.3)	9.5 (0.6)	11.8 (1.7)	10.0 (1.6)	10.0 (0.0)	11.5 (0.6)	11.25 (1.3)
Acetone 50	5106 (756)	23.5 (2.7)	20.0 (0.8)	9.25 (0.9)	11.8 (1.3)	0.0 (0.0)	10.0 (0.0)	11.0 (0.8)	10.8 (0.5)
Acetone 70	5271 (756)	22.8 (4.6)	16.5 (1.3)	0.0 (0.0)	8.5 (0.6)	0.0 (0.0)	11.8 (1.0)	9.0 (1.0)	0.0 (0.0)

E. coli=Escherichia coli, S. agalactiae=Streptococcus agalactiae, S. uberis=Streptococcus uberis, S. liquefaciens=Serratia liquefaciens, S. aureus=Staphylococcus aureus