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Antimicrobial activity of aqueous and ethanol extracts of two marine algae collected from Algerian west coast

By: F. Khelil-Radji, M. Y. Belhouari, D. Chemlal-Kherraz, A. Matallah-Boutiba, Z. Boutiba

Key Words: Marine algae, Antimicrobial activity, Aqueous extract, Ethanol extract, Algerian west coast

Int. J. Biosci. 10(3), 217-222, March 2017.



From medicinal point of view, marine environment is a diversified source of several biologically active compounds that are relatively untapped. Exploitation of marine resources may provide valuable leads which carry economic and scientific potential. Therefore, the present study was conducted to evaluate the antimicrobial activity of for marine algae harvested from Algerian west coast extracts in ethanol and water. Antimicrobial activities of the extracts were assessed against Gram (+) bacteria (Staphylococcus aureus, Bacillus subtilis) and Gram (–) bacteria (E. coli, pseudomonas aeruginosa) and two fungal strain Fusarium oxysporum f. sp. Albedinis and Pénicillium sp by the disk diffusion method. According to the results, the highest values of performance in crude extract are those for ethanol in both species Stypocaulon scoparium and Halopitys incurvus with percentages of 5.6% et.4% respectively. The ethanolic extract of Stypocaulon scoparium (brown seaweed) elicited remarkable antibacterial activity against all pathogenic bacteria screened, followed by Halopitys incurvus (red seaweed). All the aqueous extracts used in this study were exhibited significant antifungal activity.

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Antimicrobial activity of aqueous and ethanol extracts of two marine algae collected from Algerian west coast

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F. Khelil-Radji, M. Y. Belhouari, D. Chemlal-Kherraz, A. Matallah-Boutiba, Z. Boutiba. 2017. Antimicrobial activity of aqueous and ethanol extracts of two marine algae collected from Algerian west coast. Int. J. Biosci. 10(3), 217-222.
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