当前位置: X-MOL 学术Livest. Sci. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
The relationship between colostrum quality, passive transfer of immunity and birth and weaning weight in neonatal calves
Livestock Science ( IF 1.8 ) Pub Date : 2020-05-04 , DOI: 10.1016/j.livsci.2020.104033
L. Turini , G. Conte , F. Bonelli , M. Sgorbini , A. Madrigali , M. Mele

Calves are born almost agammaglobulinemic and thus need an adequate amount of good quality colostrum to avoid failure of transfer of passive immunity. The quality of colostrum is influenced by several factors such as the volume of colostrum produced, collection time, the concentration of immunoglobulins, breed, the age of dam, and mastitis events in the previous lactation. In this study, we evaluated the relationship between colostrum quality, serum total protein (TP), birth, and weaning weight of the calf.

Seventy-three calves born in the same farm were included in the study. Three liters of colostrum were administered to the calves as soon as the calf could drink while the other 3 L was administered 8 h later. Immediately after birth, and at 60 days of age, each calf was weighed. Colostrum was evaluated after calving by a qualified operator using an optical Brix refractometer. Twenty-four hours after birth, 10 mL of blood was collected from each calf in order to evaluate the serum TP using a digital refractometer. The relationship between colostrum quality, serum TP, birth and weaning weight was analyzed using a mixed linear model.

Colostrum quality increased with parity; serum TP increased in association with an increase in the Brix percentage of the colostrum administered to the calves. Data indicated that heavier calves had a lower TP at 24 h of age than lighter calves under the same colostrum transfer protocol of 6 L of quality colostrum in 12 h. Serum TP (g/dL) decreased continuously in all calves from 8.267 by 0.032 x kg of birth weight.

The birth weight of the calves could influence the quantity of colostrum necessary to achieve the same level of TP, so heavy calves should be fed more. Further studies would be necessary in order to evaluate the mechanism of IgG absorption in the gut of calves with different body weight.



中文翻译:

初生犊牛的初乳质量,免疫力的被动转移与出生和断奶体重之间的关系

犊牛出生时几乎具有血球蛋白血症,因此需要足够数量的优质初乳,以避免转移被动免疫的失败。初乳的质量受几个因素的影响,例如初乳的产生量,采集时间,免疫球蛋白的浓度,品种,水坝的年龄以及前一次泌乳期的乳腺炎事件。在这项研究中,我们评估了初乳质量,血清总蛋白(TP),出生和犊牛断奶体重之间的关系。

在同一农场出生的73头小牛被纳入研究。犊牛喝完后,立即向犊牛施用三升初乳,而其他3 L在8小时后施用。出生后立即和60天大时,对每只小牛称重。由合格的操作员使用光学白利糖度折光仪在产犊后评估初乳。出生后二十四小时,从每只小牛收集10毫升血液,以便使用数字折光仪评估血清TP。使用混合线性模型分析初乳质量,血清TP,出生和断奶体重之间的关系。

初乳质量随同胎而增加;血清TP升高与犊牛初乳白利糖度百分比升高相关。数据表明,在相同的初乳转移方案中,在12 h内,较重的犊牛在24 h时的TP比较轻的犊牛低。所有犊牛的血清总磷(g / dL)从8.267持续下降0.032 x kg出生体重。

犊牛的出生体重可能会影响达到相同水平总磷所需的初乳量,因此应多喂重的犊牛。为了评估不同体重的犊牛肠中IgG的吸收机理,有必要进行进一步的研究。

更新日期:2020-05-04
down
wechat
bug