Paulík S, Slanina L, Batta G, Bomba A
Vet Med (Praha). 1983 Aug;28(8):457-64.
The activity of gMT in the blood serum of calves was studied in relation to the age, concentration of total immunoglobulins (Ig) and protein (TP) and to the volume of colostrum taken in by the calves during the first post-partum sucking. Before sucking the serum activity of gMT in newborn calves is low; later it assumes an ascending tendency, the maximum activity being recorded in the 24th hour from birth. A continuous decrease follows in the subsequent postnatal period and the physiological values (of adult cattle) are obtained in the sixth to seventh weeks of age. A marked correlation was found between the values of Ig and gMT (r = 0.9988), and TP and gMT (r = 0.9911), in newborn calves at the age of 48 hours. A highly significant difference was also found in the activity of gMT (P less than 0.01) in calves with different post-partum Ig concentrations. Attention is drawn to the significant difference in the serum activity of gMT (P less than 0.05), Ig (P less than 0.01) and TP (P less than 0.05) in calves given different amounts of the first colostrum. The results of the study can be used for the evaluation of metabolic tests in calves during the early postnatal period.
研究了犊牛血清中γ-甲胎蛋白（gMT）的活性与年龄、总免疫球蛋白（Ig）和蛋白质（TP）浓度以及犊牛产后首次吮乳时摄入的初乳量之间的关系。吮乳前，新生犊牛血清中gMT的活性较低；之后呈上升趋势，出生后24小时记录到最高活性。在随后的出生后时期持续下降，在6至7周龄时达到（成年牛的）生理值。在48小时龄的新生犊牛中，发现Ig与gMT的值（r = 0.9988）以及TP与gMT的值（r = 0.9911）之间存在显著相关性。在产后Ig浓度不同的犊牛中，gMT的活性也存在极显著差异（P < 0.01）。不同初乳摄入量的犊牛血清中gMT的活性（P < 0.05）、Ig（P < 0.01）和TP（P < 0.05）存在显著差异，需引起注意。该研究结果可用于评估犊牛产后早期的代谢试验。
