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, Pages 190-200 PDF (2.7 M) | ||
| Document Type: Research article | ||
| DOI: 10.21608/avmj.1998.183305 | ||
| 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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