1Veterinary College, Karnataka Veterinary Animal and Fisheries Science University, Shivamogga-577 204, Karnataka, India
Laboratory of Aquatic Animal Health Management, Department of Aquaculture, College of Fisheries, Karnataka Veterinary Animal and Fisheries Science University, Mangalore-575 002, Karnataka, India
* Corresponding Author: M.A.A. Mamun, Laboratory of Aquatic Animal Health Management, Department of Aquaculture, College of Fisheries, Karnataka Veterinary Animal and Fisheries Science University, Mangalore-575 002, Karnataka, India, Email: mamunff@gmail.com
Online published on 30 June, 2020.
Biofilm of Aeromonas hydrophila oral vaccine was evaluated on growth and histopathological features of striped catfish, Pangasianodon hypophthalmus. Fish were fed with feed incorporating biofilm (BF) or free cell (FC) of A. hydrophila vaccine at 1010 cells/fish/day for 20 days and basal feed for 60 days. From 30th day onwards, till end of the trial, the mean weight gain (g/fish) was significantly higher (P<0.05) in BF treated group than both FC and control group. At the end of the study, histopathological changes in gills, liver and kidney were evaluated using haematoxylin eosin technique. The histopathological findings, in BF fed P. hypophthalmus, showed normal architechture of the gills, liver and kidney. However, fishes fed on FC and control group, resulted several histopathological abnormalities in all the organs.
Aeromonas hydrophila, Biofilm based oral vaccines, Growth, Histopathology, Striped catfish
