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The aim of this study was to isolate and identify bacteria demonstrating an algicidal effect against Alexandrium catenella and to determine the activity and range of any algicide discovered. The morphological and biochemical attributes of an algicidal bacterium, isolate YS-3, and analysis of its 16S rRNA gene sequence revealed it to be a member of the genus Brachybacterium. This organism, designated Brachybacterium sp. YS-3, showed the greatest effect against A. catenella cells of all bacteria isolated, and is assumed to produce secondary metabolites. [Source: Journal of Microbiology]
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