Department of Animal Health, Faculty of Natural and Agricultural Science, North-West University, Mafikeng.
Onderstepoort J Vet Res. 2019 Aug 29;86(1):e1-e7. doi: 10.4102/ojvr.v86i1.1742.
Minimising health problems and increasing yield have always been the objectives in livestock agriculture. Hence, increases in incidences of reproductive conditions in cattle farming pose a great threat to productivity and impose undesirable economic implications. This study aimed to examine the concentrations of different biochemical compounds in cows with reproductive conditions. Seventy-seven blood samples were collected from cows at different rural areas around Mafikeng, following cases of downer cow syndrome, dystocia, retained placenta, vaginal prolapse and abortion. Means of serum metabolites across the different reproductive conditions were statistically compared using Pearson's chi-square test to determine variations of serum metabolites in cows of different breeds. In mixed breed cows, higher than normal calcium concentrations were observed in downer cow syndrome (25.25 ± 8.47) and dystocia (85.50 ± 8.46) cases. It was also observed that cholesterol concentrations were significantly low in abortion (2.52 ± 0.79), retained placenta (3.18 ± 0.61) and vaginal prolapse (2.37 ± 0.97) cases in Afrikaner cows. The study showed that Brahman (43.1%) and Afrikaner (43.1%) breeds were mostly affected by downer cow syndrome. Additionally, the occurrences of downer cow syndrome (53.9%) and abortions (60%) were mostly observed in cows of 1-3 years, in second and first parities, respectively. This study proves that concentrations of calcium, urea or blood urea nitrogen (BUN), magnesium and cholesterol are significantly altered in incidences of reproductive conditions in cows of different breeds. It is also shown that serum biochemistry is affected by reproductive conditions in cows of different ages and parity. This data serves as a tool that could be used to enhance research in animal production and reproduction.
最大限度地减少健康问题和提高产量一直是畜牧业的目标。因此，奶牛养殖中生殖疾病发病率的增加对生产力构成了巨大威胁，并带来了不良的经济影响。本研究旨在检查患有生殖疾病的奶牛体内不同生化化合物的浓度。从马弗京周围不同农村地区的奶牛身上采集了 77 份血液样本，这些奶牛患有产后期瘫痪综合征、难产、胎衣不下、阴道脱垂和流产等病例。使用 Pearson 卡方检验统计比较不同生殖状况下的血清代谢物平均值，以确定不同品种奶牛的血清代谢物差异。在混合品种奶牛中，产后期瘫痪综合征（25.25±8.47）和难产（85.50±8.46）病例中，钙浓度高于正常水平。还观察到阿非利卡牛流产（2.52±0.79）、胎衣不下（3.18±0.61）和阴道脱垂（2.37±0.97）病例中的胆固醇浓度明显降低。研究表明，婆罗门牛（43.1%）和阿非利卡牛（43.1%）品种受产后期瘫痪综合征的影响最大。此外，产后期瘫痪综合征（53.9%）和流产（60%）的发生主要见于 1-3 岁的奶牛，分别处于第二和第一胎次。本研究证明，不同品种奶牛生殖疾病的发生会导致钙、尿素或血尿素氮（BUN）、镁和胆固醇的浓度显著改变。还表明，不同年龄和胎次奶牛的生殖状况会影响血清生化。该数据可作为增强动物生产和繁殖研究的工具。
