Abstract: The aim of this study was to monitor the immune status of major infectious diseases of livestock and poultry in Ninghai County from 2013 to 2016. The antibodies of swine, bovine, sheep, chicken and duck were determined according to the national standards. The testing results showed that the overall immune status of livestock and poultry in Ninghai County was good from 2013 to 2016. The average annual positive rates of foot and mouth disease (FMD) type O, classical swine fever and porcine reproductive and respiratory syndrome antibodies in swine were 76.27%, 75.84% and 79.88%, respectively. The positive rates of FMD types O, A and Asia I antibodies in bovine were all above 90%. The average annual positive rates of FMD types O and Asia I antibodies in goat were 65.37% and 67.52%, respectively, and the immunization needs to be strengthened. The positive rate of H7N9 antibodies in poultry (chicken and duck) were 0. The average annual positive rates of H5N1 in chicken and duck were 98.67% and 95.60%, respectively. The average annual positive rate of Newcastle disease (ND) antibody was 62.86%, which was affected by season. In summer, the positive rate of ND was the lowest (quarter average 54.64%). It still needs to strengthen the immunity of ND. This study has summarized the immunity effects of the major infectious diseases in Ninghai County from 2013 to 2016, which could provide the basic data for the formulation and evaluation of the compulsory immunization program in China.

Key words: immune monitoring, foot and mouth disease, classical swine fever, porcine reproductive and respiratory syndrome, avian influenza, Newcastle disease