7-days of FREE Audio papers, translation & more with Prime
7-days of FREE Prime access
7-days of FREE Audio papers, translation & more with Prime
7-days of FREE Prime access
https://doi.org/10.1016/s0372-5545(17)57286-7
Copy DOIJournal: The Veterinary Journal (1900) | Publication Date: Jun 1, 1915 |
A new bacterial disease (flectobacillosis) caused by Gram negative, long rod shaped Flectobacillus roseus in captive held carp, rohu (Labeo rohita) in West Bengal, India is described. Besides the phenotypic and molecular characterization, histopathology of F. roseus of naturally infected and challenged rohu were studied. The affected rohu had loss of mucus and scale, discoloured body, peeled skin and rotten tail, but no signs of gill damage. On selective cytophaga agar, F. roseus produced pink to rose pigmented colonies. Phylogenetically, F. roseus RF1 formed a monophyletic branch with F. roseus EU921645 (96% sequence similarity) and Flectobacillus sp. KC588923 (94% sequence similarity). It caused significant mortalities in rohu when challenged. The naturally infected rohu showed epithelial disruption, inflammation and necrosis of skeletal muscle tissue accompanied by haemocyte infiltration. The kidney of challenged rohu showed proximal and distal tubule degeneration, necrosis, thickening of epithelial layer of proximal and distal tubules, necrotised haematopoietic tissue, nephritic tubule with widened lumen, vacuolation of tubular epithelium, glomerular congestion, desquamation, glomerulopathy with dilated Bowman's space, cellular and nuclear hyperprophy, pycnotic nuclei, melano-macrophage aggregates and granuloma-like inflammatory response. These results suggest that F. roseus can produce systemic pathology in kidney similar to many other known fish pathogens.
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.