Test on Development and Immune Efficiency of Inactivated Vaccine Against ETEC in Yak

The aluminum_adjuvant inactivated vaccine,oil_adjuvant inactivated vaccine and honey_adjuvant inactivated vaccine were developed and been tested for immune efficiency.The antibody examination showed that the antibody level produced by honey_adjuvant inactivated vaccine was the highest(2 7)at day 7 post immunization.As time pass by,the antibody titre reached its peak with oil_adjuvant inactivated vaccine.They were challenged to all the rabbits with ETECat 29 days post inoculation.The immunized rabbits could absolutely resist the challenge and the rabbits of control group were dead all.The results proved that the all three inactivated vaccines could brought proteciton rabbits from the ETEC of yak.