RT - Journal Article T1 - Experimentally pathogenesis of Aeromonas hydrophila in freshwater Crayfish (Astacus leptodactylus) in iran JF - IFRO YR - 2012 JO - IFRO VO - 11 IS - 3 UR - http://jifro.ir/article-1-635-en.html SP - 644 EP - 656 K1 - Astacus leptodactylus K1 - Aeromonas hydrophilia K1 - Total Hemocyte Count K1 - Total Protein Concentration K1 - Histopathology AB -  In this research the affect of A. hydrophila on pathogenesis of Crayfish A. leptodactylus was carried out. This study was designed in three groups as treatments and one group as control in triplicate with 20 Crayfish in each glass aquarium. The treatments have exposed to A. hydrophila. The concentrations of the bacteria in treatments were      , and   CFUmL-1 respectively. The untreated control group was disinfected by oxytetracyclin at concentration of 100 ppm for 24 hours. The haemolymph samples were withdrawn for measuring of THC and TPC within interval hours (2, 6, 12, 24, 48, 96, 144, 240 and 336). The Crayfish samples were then fixed in Davidson fixative. The results showed that the differences of THC value between treatment 4 (95.33±23.16) and control (1.13±.45) were significant (P LA eng UL http://jifro.ir/article-1-635-en.html M3 ER -