Antibacterial activity of aqueous and ethanol crude extracts of the root barks of Alstonia boonei and preliminary phytochemical test of Morinda lucida

摘要

The antibiotic activity of aqueous and ethanol extracts of the root bark of two plantsAlstonia booneiDe wild andMorinda lucidalocally used for treating different diseases especially fever were studied against seven bacteria. Crude extracts obtained fromA.booneiwere not potent against any of the bacterial tested.Bacillus subtiliswas the most sensitive organism to the ethanol root bark extracts ofM.IucidawhilePseudomonas aeruginosawas the least sensitive. Difference in antibacterial activity of these plants show that different bioactive components are present in each species. Preliminary phytochemical test ofM. Iucidaplant parts showed presence of saponins, anthraquinone, cardenolides, alkaloids but absence of tannins.