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A marine bacterium, Micrococcus MCCB 104, antagonistic to vibrios in prawn larval rearing systems
N S Jayaprakash1, S Somnath Pai, A Anas
1Centre for Fish Disease Diagnosis and Management, School of Environmental Studies, Cochin University of Science and Technology, Lake Side Campus, Fine Arts Avenue, Cochin 682016 Kerala, India.
Abstract:
A marine bacterium, Micrococcus MCCB 104, isolated from hatchery water, demonstrated extracellular antagonistic properties against Vibrio alginolyticus, V. parahaemolyticus, V. vulnificus, V. fluviallis, V. nereis, V. proteolyticus, V. mediterranei, V cholerae and Aeromonas sp., bacteria associated with Macrobrachium rosenbergii larval rearing systems. The isolate inhibited the growth of V. alginolyticus during co-culture. The antagonistic component of the extracellular product was heat-stable and insensitive to proteases, lipase, catalase and alpha-amylase. Micrococcus MCCB 104 was demonstrated to be non-pathogenic to M. rosenbergii larvae.
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