Immune Procedure of Avian in Fluenza Vaccine for Duck

In order to scientifically make the immune procedure of avian influenza vaccine for duck, three tests including the detection of the variety of maternal antibody levels in different breeds, the antibody detection after first immunization, and the relationship of immune procedure and antibody levels variety were made. The results showed that the AI-HI antibody levels of 1 week old ducks were relative higher, and then dropped to 4 log2 or even lower at 15 to 17 days old. The AIHI antibody in ducks was detected at 2 weeks after first immunization, and antibody level reached peak at four weeks after first immunization(4.8log2). The antibody level was stable 4 weeks and then began to drop. The antibody levels in meat ducks had great difference after first immunization. AIV was not prevented completely. The AI-HI antibody level of breeding ducks reached to 9~11 log2 when the ducks got first immunization at 8 days old, the second immunization at 60 days old,and booster immunization were at 120 days old. The antibody level maintained at 6~9 log2 after 10 months.