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Changes in the level of specific antibodies in egg laying geese and their progeny after vaccintion against Derzysy’s disease were examined. Two different prophylactic programs were compared: double vaccination before hatching season (form S) and first vaccination before and the second in the middle of hatching season (farm W). At the beggining of hatching season the level of antibodies in geese in...
Опыт провели на 3 группах гусят из разных периодов инкубаторного сезона. В течение 35 дней жизаи птиц, каждые 5 дней, брали кровь и определяли в сыворотках титры материнских противотел, нейтрализирующих против парвовируса болезни Дерси. На 35 день жизни инфицировали гусят вирулентным вирусом DDV и через 10 дней заново определяли титрь противотел. Реакцию серонейтрализации выполняли методом микро в...
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