Mitev G, Tekerlekov P, Genchev G
Vet Med Nauki. 1975;12(7):3-7.
It has been found that the antibody titers in the case of passive immunity in calves from cows that have recovered from foot-and-mouth disease or have been vaccinated against it rise immediately following the intake of colostrum. They have been found to reach a peak level, displaying maximal values for a long period of time. Later on the antibody titers decline gradually. Specific antibodies have also been demonstrated at the age of more than two months following birth. Higher values of passive immunity have been established in calves from survivals and from cows that have been vaccinated twice and this is explained by the presence of a higher content of foot-and-mouth disease antibodies in the dams. The importance of passive immunity for the prevention of the disease in growing animals is discussed.
已经发现，从口蹄疫康复或已接种口蹄疫疫苗的母牛所产犊牛的被动免疫情况下，抗体效价在摄入初乳后立即上升。已发现它们达到峰值水平，并在很长一段时间内显示出最大值。后来抗体效价逐渐下降。在出生后两个多月时也已证明存在特异性抗体。在存活母牛所产犊牛以及接种过两次疫苗的母牛所产犊牛中建立了更高的被动免疫值，这是由于母畜中口蹄疫抗体含量较高所致。讨论了被动免疫对预防生长动物疾病的重要性。
