Aqueous and ethanolic extracts of leafy stems of Acacia hockii harvested in Tangui�©ta, were examined for antimicrobial and\nantioxidant activities. Phytochemical screening of A. hockii was performed using two complementary methods: tube test\nand thin layer chromatography method. Antimicrobial activities of aqueous and ethanolic extracts were investigated against\nfour Gram Positive and two Gram negative strains bacteria and three species of Aspergillus. The microdilution and agar\ndiffusion methods were used to evaluate antibacterial and antifungal activities respectively. The antioxidant activity was\nevaluated by 2,2-diphenyl-1-picryl-hydrazyl (DPPH) method. The results showed the presence of Alkaloids, flavonoids,\nanthracene derivatives, tannins, pigments, triterpenes, saponins and lignans in aqueous and ethanolic extracts of A. hockii\nleafy stems. Coumarins are only present in the ethanolic extract. The minimum inhibitory concentrations of extracts ranged\nfrom 0.625 mg/ml to 5 mg/ml. Both extracts showed significant inhibition effect of sporulation with an inhibitory\npercentage up to 95.88%, while little to moderate inhibition was obtained against the mycelium growth (36.62 to 78.80 %).\nAntioxidant activity of extracts ranged from 6 to 96 %. The results suggested that Acacia hockii extracts contains\nantimicrobial and antioxidant agents.
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