Journal of Pure and Applied MicrobiologyVol. 2 No. 2

Pathogenicity of EUS Associated Aeromonas hydrophila, Artificially Injected to Channa striatus (Bloch)

S.A. Mastan

P.G. Department of Biotechnology, D.N.R College, P.G Courses and Research Centre, Bhimavaram- 534 202, India.

Received on 14 May 2008 and accepted on 21 August 2008



Experiments have been conducted with A. hydrophila, which was isolated from EUS affected Mystus cavasius and injected to Channa striatus intraperitoneally and observations were made at regular intervals for 96hrs to study the disease progress. Visible clinical and behavioural symptoms were noticed. Moribund and dead fish were autopsied to observe pathological changes in different organs. The LD50 value obtained was 2.98x103 cells/ml. The statistical analysis such as regression equation, chi-square, LogLD50 ± standard deviation (SD) and fiducial limits (FL) of the data were recorded as Y= -3.070 + 2.322x, 4.027, 3.4742 ± 0.0651, 2.22 ª103 and 4.00 x 103 cells/ml, respectively. The chi-square value was found to be significant at P? 0.05.

Keywords : Pathogenicity, EUS Aeromonas hydrophila, Channa striatus.