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The cytotoxicity and antimicrobial activity of different Moringa oleifera seeds extracts were tested against Scenedesmus obliquus (green algae), Escherichia coli ATCC 13706, Pseudomonas aeruginosa ATCC10145, Staphylococcus aureus NAMRU 3 25923, Bacillus sterothermophilus (bacterial strains) and Herpes Simplex virus type 1 (HSV 1) and Polio virus type 1 (sabin vaccine). Fixed oil extracted from the seeds was found to activate the growth of Scenedesmus obliquus with high algal biomass production. Aqueous methanolic extracts (LC50 207.5 mg/L) and water extract (LC50 287.5 mg/L) has a cytotoxicity effect on Scenedesmus growth. On the other hand, the antibacterial effects of fixed oil, aqueous methanolic extract and water extract concentrations showed a fluctuation in its effects. Although, Ps. aeruginosa was more resistant to all M. oleifera extracts, B. sterothermophilus was more sensitive than other organisms to all extracts. The effect of aqueous methanolic extract and fixed oil on HSV1 was highly similar, 52.22% and 45.2%. Very low activity was observed for fixed oil on PV1.
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Ali et al. (2004) studied this question.
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