National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Isolation of Flavobacterium sp. from the gill of telescopic eye goldfish Carassius auratus with white patches on gill along with its phenotypic, molecular and phylogenetic characteristics are described in this report. The diseased goldfish from a cemented tank (6.75 m3) had gill rot, white patches on gill with excess mucus secretion. On selective cytophaga agar, inocula from the gills yielded yellow pigmented colonies. A bacterial strain (WPGT1) isolated from the gill of goldfish formed a monophyletic group with other strains of Flavobacterium sp. based on phylogenetic analyses. The strain Flavobacterium sp. WPGT1 (NCBI accession number KP997191) was Gram negative long rod and weakly pathogenic to C. auratus. It caused only 14.29% mortality at a level of 3.50x106 cells/ml through immersion challenge after skin wounding; while no mortality was recorded in intraperitonially injected goldfish even at 3.50x108 cfu/fish. Understanding the pathology and pathogenesis of this emerging pathogen in cultured goldfish would help manage flavobacteriosis.
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