Stott G H, Reinhard E J
J Dairy Sci. 1978 Oct;61(10):1457-61. doi: 10.3168/jds.S0022-0302(78)83749-7.
Dystocial calves were tested for their ability to absorb colostral immunoglobulins and establish a competent passive immunity. Twenty dystocial and 20 eutocial calves were fed 1 liter of colostrum 4 h after birth and an additional liter 12 h later. Their absorption of the immunoglobulins A, G, and M, as indicated by serum concentrations, was equivalent at 16 and 24 h postpartum. Cortisol concentrations in serum at birth were high in both eutocial and dystocial calves and were correlated negatively with environmental temperatures prior to parturition. The dystocial calves had a lower cortisol concentration in serum at birth. The differences in cortisol concentrations between dystocial and eutocial calves and between experimental blocks influenced by environmental temperature could not be related to immunoglobulin absorption.
对难产犊牛吸收初乳免疫球蛋白并建立有效被动免疫的能力进行了测试。20头难产犊牛和20头顺产犊牛在出生后4小时喂给1升初乳，12小时后再喂1升。产后16小时和24小时，血清浓度显示它们对免疫球蛋白A、G和M的吸收情况相当。顺产和难产犊牛出生时血清中的皮质醇浓度都很高，且与分娩前的环境温度呈负相关。难产犊牛出生时血清中的皮质醇浓度较低。难产犊牛与顺产犊牛之间以及受环境温度影响的实验组之间皮质醇浓度的差异与免疫球蛋白吸收无关。
