STUDIES ON THE VIRULENCE OF AEROMONAS HYDROPHILA IN NILE TILAPIA (OREOCHROMIS NILOTICUS) | ||||
Assiut Veterinary Medical Journal | ||||
Article 15, Volume 40.1, Issue 79, October 1998, Page 190-200 PDF (2.7 MB) | ||||
Document Type: Research article | ||||
DOI: 10.21608/avmj.1998.183305 | ||||
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Author | ||||
M.S.M. Gado | ||||
Dept. of Poultry and Fish Diseases, Fac. Vet. Med., Kafr El-Shiekh, Tanta University | ||||
Abstract | ||||
I'welve Aeromonas hydrophila isolates isolated from diseased fish in kafr El-Shiekh province were studied for their virulence in Nile Tilapia (Oreochromis niloticus). The most virulent five isolates used in this study shared a common resistance to the killing effect of Tilapia fish serum. Other factors such as lack of autoagglutiuation in 0.2% acriflavine, instability after boiling, production of an S-layer, proteases and haemolysins did not correlate well with virulence. In addition, serotyping could not group all the virulent isolates. On the other hand, serum resistance proved to be a good indicator for screening virulence of Aeromonas hydrophila isolates. | ||||
Keywords | ||||
Key Words: Tilapia; Aeromonas; Hydrophlia | ||||
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