Table 2. The means (SD) of agar well diffusion assay-(mm) after 7 days from 9 separate groups.

Group/concentration	25 µg	50 µg	100 µg	200 µg
Group 1	33.83 (0.40) a	35.66 (0.51)a	36.50 (0.54)a	38.16 (0.75)a
Group 2	35.66 (0.56)a	36.66 (0.51)a	37.50 (1.24)a	39.66 (1.03) a
Group 3	34.83 (0.75)a	35.83 (0.75)a	37.83 (0.75)a	39.33 (0.81)a
Group 4	18.83 (0.75)a	20.83 (0.75)a	26.16 (0.93)a	29.50 (0.54)a
Group 5	26.66 (1.50)a	28.66 (0.51)a	29.83 (0.75)a	34.00 (0.63)a
Group6	0.00 (0.00)	0.00 (0.00)	4.33 (4.75)	9.00 (4.47)a
Group7	0.00 (0.00)	0.00 (0.00)	6.66 (5.16)a	11.66 (1.03)a
Group8	0.00 (0.00)	0.00 (0.00)	1.66 (4.08)	6.50 (5.04)
Group9	0.00 (0.00)	0.00 (0.00)	0.00 (0.00)	0.00 (0.00)

^a Indicates a significant difference (P<0.05) compared with the control group (group 9) according to Mann-Withney U test