Research Report

Histopathology of Aeromonas caviae Infection in Challenged Nile Tilapia Oreochromis niloticus (Linnaeus, 1758)  

Anwesha Roy , Jasmine Singha , Thangapalam Jawahar Abraham
Department of Aquatic Animal Health, Faculty of Fishery Sciences, West Bengal University of Animal and Fishery Sciences, 5, Budherhat Road, Chakgaria, Kolkata-700094, West Bengal, India
Author    Correspondence author
International Journal of Aquaculture, 2018, Vol. 8, No. 20   doi: 10.5376/ija.2018.08.0020
Received: 15 Jun., 2018    Accepted: 13 Aug., 2018    Published: 31 Aug., 2018
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This is an open access article published under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Preferred citation for this article:

Roy A., Singha J., and Abraham T.J., 2018, Histopathology of Aeromonas caviae infection in challenged Nile tilapia Oreochromis niloticus (Linnaeus, 1758), International Journal of Aquaculture, 8(20): 151-155 (doi: 10.5376/ija.2018.08.0020)


Aeromonas caviae is one of the predominant motile aeromonads in Nile tilapia, Oreochromis niloticus. In this study, the histopathological alterations in the kidney, liver and pancreas of O. niloticus juveniles experimentally challenged with α-haemolytic A. caviae is described. The Nile tilapia experienced 60% mortalities at a challenge dose of 6×108 cells/fish. Post-challenge, well-defined histopathological changes were observed with nephritis and the loss of structural integrity of the kidney tissues. The liver was dispersed, necrotized and had fatty changes in the hepatic parenchyma. Inflammation of the pancreas, as well as pancreatic acinar cells and disintegration of intrahepatic exocrine pancreatic tissues, were also noted. The results, thus, demonstrated that A. caviae can cause severe damages in the kidney, liver and pancreas of O. niloticus, similar to those of other known fish bacterial pathogens.

Aeromonas caviae; Oreochromis niloticus; Histopathology; Nephropathy; Inflammation
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International Journal of Aquaculture
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