[Objective] This paper aimed to provide scientific basis for establishing appropriate immune program. [Method] HC antibody level examinations were done for the 270 copies of serum collected from pig farm. [ Result] 10...[Objective] This paper aimed to provide scientific basis for establishing appropriate immune program. [Method] HC antibody level examinations were done for the 270 copies of serum collected from pig farm. [ Result] 106 copies of serum were found giving pre-feeding immunization, and the proportion of pigs at 20, 30, 40, 50, and 60-day old after giving pre-feeding immunization without serum immunity were 0, 0, 14.2% and 0 respectively. The proportion of antibody titer ≥ 1 ： 128 dropped from 42.6% at the age of 40 days to 28.4% at the age of 50 days and 12.5% at the age of 60 days. For the examined 164 copies of 25-day old piglets＇ serum titer, all maternal antibody was≥1 ： 16, but the proportion of antibody titer i〉 1 ： 128 dropped from 96% at the age of 20 days to 62.5% at the age of 25 days. [ Conclusion ] Diverse proportions of pigs with unqualified immunization and antibody level existed in swinery, this might be the main reason for hog cholera outbreak in pig farms展开更多
基金National Agricultural Achievement Reformer Program of Ministry of Science and Technology(2012GB2420045)Major Special Program of Transgenic Organism New Variety's Breeding(NO.2013ZX08006-001)Qinhuangdao Science and Technology Development Plan(NO.201101A181)
文摘[Objective] This paper aimed to provide scientific basis for establishing appropriate immune program. [Method] HC antibody level examinations were done for the 270 copies of serum collected from pig farm. [ Result] 106 copies of serum were found giving pre-feeding immunization, and the proportion of pigs at 20, 30, 40, 50, and 60-day old after giving pre-feeding immunization without serum immunity were 0, 0, 14.2% and 0 respectively. The proportion of antibody titer ≥ 1 ： 128 dropped from 42.6% at the age of 40 days to 28.4% at the age of 50 days and 12.5% at the age of 60 days. For the examined 164 copies of 25-day old piglets＇ serum titer, all maternal antibody was≥1 ： 16, but the proportion of antibody titer i〉 1 ： 128 dropped from 96% at the age of 20 days to 62.5% at the age of 25 days. [ Conclusion ] Diverse proportions of pigs with unqualified immunization and antibody level existed in swinery, this might be the main reason for hog cholera outbreak in pig farms
