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首页> 外文会议>Annual Conference of the New Zealand Society of Animal Production >Colostral immunoglobulin G as a predictor for serum immunoglobulin G concentration in dairy calves
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Colostral immunoglobulin G as a predictor for serum immunoglobulin G concentration in dairy calves

机译：脱毛免疫球蛋白G作为乳制牛犊血清免疫球蛋白G浓度的预测因子

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Feeding newborn calves high-quality colostrum is of well-recognised importance as calves that do not receive an adequate concentration of immunoglobulin-G (IgG) have an increased risk of morbidity and mortality. This experiment aimed to characterise IgG concentrations in colostrum from the first milking in New Zealand dairy cows, examine IgG status of calves, and to evaluate the use of a refractometer for estimating quality of colostrum in terms of IgG concentration. Heifer calves entered the calf shed at 0-24 hours of age and were fed pooled first-milking colostrum within eight hours of entering the shed. Blood samples were taken the following morning. Cows were individually milked and samples from individual and pooled colostrum were analysed. IgGconcentration of serum and colostrum samples were determined by turbidimetric immunoassay. IgG concentration was adequate according to commercial reference ranges in 70.1% of individual colostrum, 80.0% of pooled colostrum and 82.5% of calf serum samples. There was no relationship between calf serum and IgG concentration in dam or pooled colostrum. The refractometer was a good predictor of IgG concentration in serum (r=0.64, PO.0001) and colostrum both in dam (r=0.87, PO.0001) and pooled (r=0.81, P<0.0001) samples. The relationship between IgG concentration and refractometer reading indicates that it could be a useful on-farm tool.
机译：饲养新生犊牛高质量的初乳是众所周知的重要性，因为没有接受可获得足够的免疫球蛋白-G（IgG）的小腿具有增加的发病率和死亡率的风险。该实验旨在将新西兰奶牛的第一次挤奶中的初乳中的IgG浓度表征，检查犊牛的IgG状态，并评估折射仪以估算初乳的质量。小腿小牛在0-24小时的年龄进入小牛棚，并在进入棚屋的八个小时内被汇集了第一枚挤奶初乳。第二天早上采取了血样。奶牛被单独挤奶，分析来自个体和汇集初乳的样品。血清和初乳样品的Iggconcentation通过浊度免疫测定法测定。 IgG浓度根据商业参考范围是足够的，70.1％的个体初乳，80.0％的合并初乳和82.5％的小牛血清样品。小牛血清和坝中的IgG浓度之间没有关系，或者粘合初乳。折射仪是血清中IgG浓度的良好预测因子（R = 0.64，PO.0001）和初乳（r = 0.87，PO.0001）和汇集（r = 0.81，p <0.0001）样品。 IgG浓度与折射计读数之间的关系表明它可能是一个有用的农用工具。

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