The Study of Neutralization Antibody Evaluation against Muscovy Duck Reovirusis Alive Vaccine in Muscovy Ducklings

To determine antibody response in the serum of muscovy ducks immunized with muscovy duck reovirusis(MDRV)alive vaccine,the fluctuation of antibody titers was detected in the serum by fixed virus-serum dilutions method.The results showed that some muscovy ducks turned positive on antibody against MDRV after vaccination in 28th day,while all of them appeared to be MDRV-antibody positive within 35days;the peak titer of the antibody showed at the 6th month after vaccination,and the period of effective immunization could last over 18months.The results told that there was a long delay between MDRV vaccination and antibody origin,while the duration of antibody production was relatively long,which provided scientific basis for immune procedure development.