Précausta P, Kato F, Brun A
Dev Biol Stand. 1978;41:367-79.
This paper deals with the comparative development of active immunity in young pigs which were born from unvaccinated sows and from recently vaccinated sows. The development of immunity is expressed by the neutralizing serum antibody titer and protection against a pathogenic virus. The results show that: --the post-vaccinal increase in antibodies is inversely proportional to the titer of passive antibodies at the time of vaccination, --protection at the end of economic life depends on the antibody titer at the time of the challenge, --young pigs born from a mother which is not immune can be vaccinated starting at the age of 7 days, --the percentage of protection at the end of economic life of vaccinated baby pigs with colostral antibodies ranges from 50% when the vaccination was carried out at the age of 7 days to 100% when the vaccination occurs at the age of 2 months.
本文探讨了未接种疫苗的母猪所生幼猪与近期接种疫苗的母猪所生幼猪主动免疫的比较发育情况。免疫的发育通过中和血清抗体滴度和对致病性病毒的保护作用来体现。结果表明：——接种疫苗后抗体的增加与接种时被动抗体的滴度成反比，——经济寿命结束时的保护作用取决于攻毒时的抗体滴度，——未免疫母猪所生的幼猪在7日龄时即可开始接种疫苗，——有初乳抗体的接种仔猪在经济寿命结束时的保护率，7日龄接种时为50%，2月龄接种时为100%。
