Some studies on the vaccinal strain of duck plague virus

Seven experiments as conducted in this study aimed to show the Mist suitable conditions for the propagation and preservatjo~ of the vaccinal strain of duck plague virus. In the first experiment, the best route for inoculation of duck )})r,Que vaccinal strIn’ ·the t h i r d e x per i men t s the bes t i n c u ba t i ontemperature, !Jr propagation of duck plague vaccinal strain 370C \»n1c.h gave 109.69 EID~oIml while 34°C and 40°C gave wC.s 107 61 and 1l)5·26 EIDso/ml respectively. f’, 1 S 0 the pat hog e n i c i t y u sin g Mo r tal i t y I n d e x for ChickeJ\ ;.A·IYO