A method for inhibiting growth of bacteria is provided wherein the method comprises the step of administering to a region in need of bacterial growth inhibition an anti-bacterially effective amount of a composition comprising an extract from the plant . The method has utility in the treatment of a number of conditions, including cariogenesis, halitosis, gingivitis and/or periodontitis. The method of the invention may also be used ex vivo to prevent growth of bacterial biofilms on the surfaces of medical devices and other surfaces, such as those found in water systems, ventilation systems, plumbing systems, air conditioners, humidifiers and hot tubs.
