National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
The purpose of this study was to investigate the antibacterial and anti-fungal activities of four species Sargassum namely: Sargassum polycystum, Sargassum oligocystum, Sargassum crassifolium and Sargassum cristaefolium collected along the coastal areas of Diora-Zinungan Sta. Ana Cagayan, Philippines. Extracts of powdered seaweeds were prepared using sequential extraction with different organic solvents in order to increasing the polarity (Ethanol, n-hexane, dichloromethane and ethyl acetate and aqueous). Five fractions (Ethanol, n-hexane, dichloromethane ethyl acetate and aqueous) were examined for antimicrobial activity by using disc diffusion assay on thirteen (13) strains of aquaculture pathogens. The n-hexane, dichloromethane, ethyl acetate extracts displayed different antimicrobial activity against different aquaculture pathogenic bacteria and fungi whereas ethanolic extracts showed higher antimicrobial activity than aqueous extracts. The extracts of Sargassum sp. showed a significant antimicrobial activity against Gram-positive and Gram-negative as well as the fungus. Among the tested brown seaweeds, Sargassum polycystum exhibited the better antimicrobial activity that has potentially used as antimicrobial agent and as natural immunostimulant with aquaculture industry for the treatment of microbial diseases and improvement of the health status of commercially important aquaculture species.
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