College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, No.5 Xinfeng Road, High and new technology development zone, Daqing, 163319, Heilongjiang, People's Republic of China.
Heilongjiang Provincial Key Laboratory of Prevention and Control of Bovine Diseases, Daqing, 163319, People's Republic of China.
Biol Trace Elem Res. 2021 Apr;199(4):1389-1396. doi: 10.1007/s12011-020-02261-1. Epub 2020 Jun 25.
Selenium is an important element in nutrition, showing great potential in the udder health of dairy cattle and in the control of subclinical mastitis. However, there are few studies on selenium and subclinical mastitis in cows, and the correlation is not clear. A trial was designed to investigate the association between serum selenium levels and the immune and antioxidant capacity of dairy cattle with subclinical mastitis. Fifty cattle in early lactation with similar background information were selected randomly from an intensive dairy farm. Blood samples were collected for the detection of serum selenium levels by ICP-optic emission spectrometer. The cattle were divided into a low-selenium group (< 0.05 mg/L) and three normal selenium groups with different serum selenium levels (0.05-0.08 mg/L). The somatic cell count, immune indexes, and other indexes in the milk of each group were detected. The somatic cell count was found to be negatively correlated with serum selenium level. GSH-Px had a low positive correlation and IL-6 had a low negative correlation with serum selenium level. With a serum glutathione peroxidase < 148 U/L and IL-6 > 451 pg/mL, the risk of subclinical mastitis in dairy cattle increased.
硒是营养中的一种重要元素，在奶牛乳房健康和控制亚临床乳腺炎方面具有很大的潜力。然而，关于奶牛硒和亚临床乳腺炎的研究较少，其相关性也不清楚。本试验旨在研究血清硒水平与患有亚临床乳腺炎的奶牛的免疫和抗氧化能力之间的关系。从一个密集型奶牛场随机选择了 50 头处于泌乳早期、具有相似背景信息的奶牛。采用 ICP 发射光谱仪检测血清硒水平。将奶牛分为低硒组（<0.05mg/L）和三个不同血清硒水平的正常硒组（0.05-0.08mg/L）。检测各组牛奶中的体细胞计数、免疫指标等指标。结果发现，体细胞计数与血清硒水平呈负相关。GSH-Px 与血清硒水平呈低度正相关，IL-6 与血清硒水平呈低度负相关。当血清谷胱甘肽过氧化物酶<148U/L 和 IL-6>451pg/mL 时，奶牛发生亚临床乳腺炎的风险增加。
