Figure 7From: Comparison of the antibacterial activity of essential oils and extracts of medicinal and culinary herbs to investigate potential new treatments for irritable bowel syndrome Antibacterial activity of spearmint extracts. Graph showing mean halo diameters +/- SEM from three disc diffusion assays to determine the effect of spearmint extracts made with various solvents on the growth of E. coli. Significance levels obtained from two-tailed t tests are denoted by stars: * = Significant, P < 0.05; ** = highly significant, P < 0.01; *** = very highly significant, P < 0.001. Significance levels for disc diffusion assays with peppermint essential oil were not determined.Back to article page