Fish Pathology
Online ISSN : 1881-7335
Print ISSN : 0388-788X
ISSN-L : 0388-788X
In VitroInhibition ofSaprolegniaby Bacteria Isolated from Lesions of Salmonids with Saprolegniasis
Mortada M.A. HusseinK. Hatai
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2001 Volume 36 Issue 2 Pages 73-78


A study was conducted to investigate the antifungal activity of some bacteria isolated from the lesions of salmonid fishes with saprolegniasis. Five of 47 isolates inhibited the growth ofSaprolegniaparasitica H2 andS. salmonisNJM 9851 on solid media. Among 8 media examined, BHI, HI, and to a lesser extent NA were suitable for demonstrating the antifungal activity. The inhibitory activity against the testedSaprolegniadid not reside in supernatant of bacterial broth culture of the selected strains. The strains which produce antifungal substances belong to the generaAlteromonas, Pseudomonas, andAeromonas. These results suggest that the selected bacteria are natural competitors ofSaprolegia, and may be used for biocontrol ofSaprolegniain aquaculture.

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