The immunization of pheasants against Newcastle disease]

ND-Adsorbatvakzine "Dessau" and Lasovak are well effective and tolerated in pheasants as immuno-prophylactic methods against Newcastle disease infection. Lasovak produces higher titres of antibodies and better rates of protection. The antibodies are created quicker too and reduced more slowly. There is no correlation between the average of antibody level and rate of protection after experimental infection. Even if antibodies are not demonstrable in hemagglutination inhibition test there is still existing a satisfactory protection. After two vaccinations in the age of chickens in 3 to 4 weeks interval and repetition after always 16 weeks pheasants can be protected effectively for the rearing and breeding seasons.