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مجله زیست شناسی اروپای مرکزی 2014
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  • antibacterial activity of marine macroalgae against fish pathogenic vibrio species

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    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
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     in mariculture, diseases of microbial origin can cause significant economic losses worldwide; the evolution of microorganism resistance to antibiotics has resulted in a growing need for new antibacterial compounds that are effective in veterinary medicine and characterized by limited undesirable side effects. increased attention has recently been turned to seaweeds as a promising source for metabolites with antimicrobial activity. vibriosis is a common disease, caused by bacteria of the genus vibrio, that can result in high mortality in aquaculture. the aim of this study was to identify seaweeds with antibacterial activity against some pathogenic vibrio species, in order to identify a possible alternative to the commonly used antibiotics in aquaculture. chloroform/methanol lipidic extracts of six seaweed species (chaetomorpha linum, cladophora rupestris, gracilaria dura,gracilaria gracilis, gracilariopsis longissima, ulva prolifera) were tested for their antibacterial activities against six fish pathogenic vibrio species using the disc diffusion method. different susceptibilities to lipidic algal extracts were observed. all six of the seaweed extracts tested demonstrated inhibition of vibrio ordalii. the best was that from gracilariopsis longissima, showing activity against vibrio ordalii, vibrio salmonicida, vibrio alginolyticus and vibrio vulnificus. the results confirmed the potential use of seaweed extracts as a source of antibacterial compounds or as a health-promoting feed for aquaculture.

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