Wilson M R, Svendsen J
Can J Comp Med. 1972 Jan;36(1):38-43.
Serum gamma globulin levels, indirect hemagglutinating antibody titres and bactericidal activity against the 0149:K91;K88ac:H10 Serotype of Escherichia coli were determined in pigs up to five weeks of age from vaccinated and non-vaccinated sows. Gamma globulin levels at two days of age were approximately twice adult levels, by three weeks of age they were one quarter of adult levels and remained so until five weeks of age. Indirect hemagglutinating antibody activity was highest at two days of age, fell until three weeks of age and then rose. Little or no indirect hemagglutinating antibody activity was detected in sera taken at two days of age from pigs from non-vaccinated sows. Only three of 26 two day old pigs had demonstrable bactericidal activity; by three weeks of age 16 of 26 had bactericidal activity. Serum from piglets of vaccinated sows had no more bactericidal activity than did sera from non-vaccinated sows.
对来自接种疫苗和未接种疫苗母猪的5周龄以内仔猪，测定了血清γ球蛋白水平、间接血凝抗体效价以及针对大肠杆菌0149:K91;K88ac:H10血清型的杀菌活性。2日龄时的γ球蛋白水平约为成年猪水平的两倍，到3周龄时为成年猪水平的四分之一，并一直维持到5周龄。间接血凝抗体活性在2日龄时最高，到3周龄时下降，然后又上升。从未接种疫苗母猪所产仔猪2日龄时采集的血清中几乎检测不到或没有间接血凝抗体活性。26头2日龄仔猪中只有3头具有可证实的杀菌活性；到3周龄时，26头中有16头具有杀菌活性。接种疫苗母猪所产仔猪的血清杀菌活性并不比未接种疫苗母猪所产仔猪的血清杀菌活性高。
