Table 2.

Zone of inhibition (Mean ± SD) of four groups at different periods.

Groups	0–6 h (n = 10)	6–12 h (n = 10)	12–24 h (n = 10)	24–48 h (n = 10)	48–72 h (n = 10)	% Change (0–6 h to 48–72 h)
Group 1	2.80 ± 0.25	1.94 ± 0.13	1.49 ± 0.19	0.99 ± 0.14	0.50 ± 0.11	82.1%
Group 2	3.93 ± 0.37	3.49 ± 0.23	2.81 ± 0.23	2.41 ± 0.19	2.03 ± 0.18	48.3%
Group 3	6.13 ± 0.21	5.60 ± 0.46	4.91 ± 0.61	4.59 ± 0.56	4.08 ± 0.28	33.4%
Group 4	0.00 ± 0.00	0.00 ± 0.00	0.00 ± 0.00	0.00 ± 0.00	0.00 ± 0.00	0.00%