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C. Ibacache-Quiroga, J. Ojeda, G. Espinoza-Vergara, P. Olivero, M. Cuellar and M. A. Dinamarca The hydrocarbon-degrading marine bacterium Cobetia sp. strain MM1IDA2H-1 produces a biosurfactant that interferes with quorum sensing of fish pathogens by signal hijacking Microbial Biotechnology 6

Article first published online: 2 JAN 2013 | DOI: 10.1111/1751-7915.12016

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The marine bacterial strain identified as Cobetia sp. MM1IDA2H-1 when grown both, using the sulphur-containing heterocyclic aromatic hydrocarbon dibenzothiophene (DBT) or in the presence of Aeromonas salmonicida subsp. salmonicida, produces a biosurfactant that plays a role in microbial competition. At the critical micelle concentration, the biosurfactant forms lipid structures that interacts with N-Acyl homoserine lactones, inhibiting their function in quorum sensing of bacterial fish pathogens. The finding represents an attractive alternative to classical antimicrobial therapies in fish aquaculture.

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