Metabolic parameters and blood leukocyte profiles in cows from herds with high or low mastitis incidence
Metabolic parameters and blood leukocyte profiles in cows from herds with high or low mastitis incidence
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DOI：
10.1016/s1090-0233(03)00180-1
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发表时间：
2004-07-01
影响因子：
2.2
通讯作者：
Sandgren, CH
中科院分区：
文献类型：
--
作者：
Holtenius, K;Waller, KP;Sandgren, CH
本研究的目的是确定年乳腺炎发病率高或低的牛群中的奶牛之间的代谢参数和血液白细胞谱是否存在差异。在这项研究中，对来自 20 个高产奶牛群的 271 头奶牛进行了检查。根据选择标准，所有牛群的体细胞计数均较低。所选牛群中的 10 个代表乳腺炎治疗发生率 (LMI) 较低，而 10 个牛群的乳腺炎治疗发生率 (HMI) 较高。在产前三周至产后 15 周期间，对农场进行了一次访问，并从每头奶牛身上采集了血样。在产后 4 周至 15 周期间，HMI 牛群中的奶牛嗜酸性粒细胞计数明显较低。 β-羟基丁酸、葡萄糖、胰岛素和尿素的血浆浓度在各组之间没有差异，但在产后三周期间，HMI 奶牛的非酯化脂肪酸浓度显着较高。 HMI 奶牛在分娩前血浆中氨基酸色氨酸的浓度明显较低。在产后的前三周内，HMI 牛群的谷氨酰胺显着降低。 HMI 奶牛的精氨酸始终较低，但仅在产后 4 至 15 周期间下降显着。结果表明，每年乳腺炎治疗发生率高或低的牛群之间的代谢和免疫状态存在差异，表明 HI 奶牛的代谢应激增加。 (C) 2003 Elsevier Ltd. 保留所有权利。
The objective of this study was to determine whether there were differences in metabolic parameters and blood leukocyte profiles between cows in herds with high or low yearly mastitis incidence. In this study, 271 cows from 20 high yielding dairy herds were examined. According to the selection criteria, all herds had low somatic cell Counts. Ten of the selected herds represented low mastitis treatment incidence (LMI) and ten herds had high mastitis treatment incidence (HMI). The farms were visited once and blood samples were taken from each cow that was in the interval from three weeks before to 15 weeks after parturition.The eosinophil count was significantly lower among cows from the HMI herds in the period from four weeks to 15 weeks after parturition. The plasma concentrations of beta-hydroxybutyrate, glucose, insulin and urea did not differ between groups, but the concentration of nonesterified fatty acids was significantly higher among HMI cows during the period three weeks after parturition. The concentration of the amino acid tryptophan in plasma was significantly lower among the HMI cows prior to parturition. Glutamine was significantly lower in cows from HMI herds during the first three weeks after parturition. Arginine was consistently lower in HMI cows, although the decrease was only significant during the period from four to fifteen weeks after parturition. The results suggest that there were differences in the metabolism and immune status between herds with high or low yearly mastitis treatment incidence indicating an increased metabolic stress in HI cows. (C) 2003 Elsevier Ltd. All rights reserved.