Table 3.

In vitro antibacterial activity of MBO against three clinical strains of H. pylori using disc-diffusion method (values expressed as mean + SEM (n = 3).

	Zone of Inhibition (mm) at Concentrations (µg/disk)							MIC50 (µg/mL)
Samples	0.5	1	2	4	8	16	32
STRAIN I
MBO	1.66 ± 0.33	2.33 ± 0.33	4 ± 0.57	6.66 ± 0.33	9 ± 0.57	12 ± 0.57	15.33 ± 0.88	15
Metronidazole	3.66 ± 0.33	4.66 ± 0.33	5.33 ± 0.66	7 ± 0.57	10.33 ± 1.20	14.66 ± 0.88	22 ± 1.15	4
STRAIN II
MBO	1.66 ± 0.33	3 ± 0	4.66 ± 0.33	7.33 ± 0.66	9.66 ± 0.33	13 ± 0.57	16 ± 0.57	14
Metronidazole	4 ± 0.57	5 ± 0.57	5 ± 0.57	7.33 ± 0.88	10.33 ± 1.20	15 ± 1	20.66 ± 1.33	6
STRAIN III
MBO	2.33 ± 0.33	3.66 ± 0.33	5 ± 0.57	8.33 ± 0.88	9 ± 0.57	13.33 ± 0.88	16.33 ± 0.88	14
Metronidazole	4 ± 0.57	4.66 ± 0.33	5.66 ± 0.88	8 ± 1.15	11.33 ± 0.66	15.66 ± 0.33	22.66 ± 0.66	4