Narasin is a new polyether antibiotic produced by a strain of Streptomyces aureofaciens. It is purified by organic solvent extraction and silica gel chromatography. Narasin is active in vitro against gram-positive bacteria, anaerobic bacteria, and fungi and is effective in protecting chickens from coccidial infections.
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Watanabe et al. (1978) studied this question.
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