Growth Inhibition of fish Pathogens by Antagonistic Actinomycetes Isolated from Mangrove environment

Rathnakala, R and Chandrika, V (1996) Growth Inhibition of fish Pathogens by Antagonistic Actinomycetes Isolated from Mangrove environment. In: The Fourth Indian Fisheries Forum, Proceedings, 24-28 November, 1996, Kochi .

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Abstract

Solvent extracts of 6 strains actinomycetes isolated from mangrove environment were found to inhibit the growth of fish bacterial pathogens. filamentous and non-filamentous fungi. Out of the 104 actinomycetes tested 56% of the isolates exhibited antagonistic effect towards gram-negative bacteria and 35.6% towards gram-positiveb acteria.The concentrationsrequired to bring about 100% inhibition of filamentous fungi was 500-760µg crude extracts. The same concentration produced inhibition zone in bacteria ranging from 2mm to IOmm in diameter against various test pathogens. Antibiograni of the actinomycetes against test pathogens showed two extreme zones (category I and Category X) of inhibition by most of the antagonistic actinomycetes. The results suggest that the crude extract of these antagonistic actinomycetes possesses both antibacterial and antifungal propcrties. Therefore the extract promises to be a potential source of antibiotics against fish bacterial pathogens.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:Growth Inhibition; Pathogens; Actinomycetes; Mangrove environment
Subjects:Fish and Fisheries > Fish Pathology
Divisions:CMFRI-Cochin > Fishery Environment
ID Code:4599
Deposited By:INVALID USER
Deposited On:30 Oct 2010 16:11
Last Modified:30 Oct 2010 16:11

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