控制性初乳供给对犊牛获取被动免疫的影响

Effect of Controlled Colostrum Supply on Passive Immunization in Calves

摘要:

饲喂犊牛初乳48 h后测定血清中免疫球蛋白(IgG),若超过10 mg/mL,说明犊牛获得了较好的免疫能力。为了探究初乳供给对新生犊牛获取被动免疫转移(TPI)的影响,选择新生犊牛72头分别以初乳饲喂时间段、饲喂量、饲喂方式、初乳质量为变量进行控制性供给试验,通过测定48 h(IgG),分析初乳控制性供给对新生犊牛获取TPI的影响。试验结果表明,在饲喂优质初乳的前提下,在犊牛出生1~2 h、按犊牛体重10%的初乳饲喂量、经巴氏杀菌(LTLT)的初乳和使用奶瓶均可以获取较好的IgG水平,IgG分别达到13.53、14.76、20.39、14.97 mg/mL,全部超过了10 mg/mL。将以上4项变量综合输入后,IgG值达到21.07 mg/mL,表明控制性初乳供给对新生犊牛获取TPI作用明显。

Abstract:

Serum immunoglobulin(IgG) levels was measured after 48 h of colostrum feeding.If the IgG level was more than 10 mg/mL,it indicates that the calf has acquired better immunity.To investigate the effect of colostrum supply on passive immune transfer(TPI) in newborn calves,72 newborn calves were selected to conduct a controlled feeding experiment with colostrum feeding time period,feeding amount,feeding mode and colostrum quality as variables,to analyze the effect of colostrum control supply on TPI acquisition in newborn calves.The results showed that,under the premise of feeding highquality colostrum,good IgG levels could be obtained within 1-2 h after calves were born,at 10% of calves’ body weight colostrum,using pasteurized colostrum(LTLT),and feeding via a bottle can all result in better IgG levels,reaching 13.53,14.76,20.39 and 14.97 mg/mL respectively,all surpassing the threshold of 10 mg/mL.The IgG value reached 21.07 mg/mL after inputting the above four variables,which indicated that the control colostrum supply had a significant effect on TPI acquisition in newborn calves.