Investigation into the outbreak of pig blue ear disease in a large-scaled pig farm in Jiangxi Province
[Objective]The aim of this study is to find out the loopholes in the prevention and control of blue ear disease through the epidemiological investigation into the disease and to put forward targeted improvement suggestions,so as to provide theoretical references for the avoidance of the relevant safety hazards in the production of the subsequent pig farms.[Method]In this study,a large-scaled swine farm in Jiangxi Province was transformed from a swine blue ear disease negative farm to a positive farm,and the sows were monitored for PRRS pathogenicity for a whole year in 2023 by using both enzyme-linked immunosorbent assay(ELISA)and dual-fluorescence real-time RT-PCR.[Result]The results showed that there had never been any PRRS outbreaks in the farm before 2023,and in the PRRS outbreak in 2023,the average antibody levels of PRRSV in sows and piglets were low and poorly homogeneous,and the outbreaks of PRRS in the farm in 2023 were concentrated in January-June,with mixed infections of the classical strains and the highly pathogenic variant strains.[Conclusion]The blue-ear epidemic had different degrees of impacts on the production of the farm,mainly reflected in the blue-ear epidemic leading to fluctuations in the level of antibody positivity in the farm,and high antigen-positive detection rate;the epidemic also triggered a decline in the level of production of the farm,which was specifically reflected in the rise in the number of sows dying due to reproductive disorders and high fever,and the frequency of sows with empty fetuses,returning to the mood,abortions,and a substantial decline in the output of healthy piglets,in turn,had a significant negative impact on the farm's economic efficiency.All this has a great negative impact on the economic efficiency of pig farms.
万方数据
维普
