some studies on a vaccinal strain of duck virus hepatitis

Nine experiments were conducted in this study whichaimed to show the most suitable conditions for thepropagation and preservation of the vaccinal strain of DVH.-. Determination of the pathogenicity using (MICE) foreach route of inoculation.The most pathogenic route was AS followed by CAM and YSroutes where their MICE were 0.463, 0.428 and 0.2respectively.- Determination of the pathological changes on CEinoculated via different r ou t e s : for 5 days observationperiod PI.