伏伊伏丁那三个奶牛场受乳腺炎影响的奶牛体细胞模式分析

N. Tešin, M. Radinović, D. Tomanić, Z. Ružić, J. Stanojević, Ivan Galić, Z. Kovačević
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引用次数: 0

摘要

摘要 牛奶中的体细胞(SCs)包括腺体上皮细胞和血细胞,在正常挤奶过程中存在于牛奶中。受乳腺炎影响的奶牛体内的体细胞会增加,体细胞可作为估计全球乳腺健康和牛奶质量的有用指标。本研究旨在确定三个不同牧场中受乳腺炎影响的奶牛的体细胞数(SCC)是否存在模式。研究于 2021 年在伏伊伏丁那省的三个高产奶牛品种牧场进行。每个牧场采集了 15 头奶牛的样本,所有奶牛均被诊断患有临床和亚临床乳腺炎。牛奶样本中的 SCC 是根据塞尔维亚标准化研究所的标准 (SRPS EN ISO 13366-1:2010),采用显微镜参考方法测定的。如果 SCC 值大于 200.000 cells/mL,则视为高值,因为这是表明分泌紊乱的临界值。为了研究三个牧场之间的差异,采用了单因素方差分析(ANOVA),并使用事后 LSD 检验来确定三个不同牧场奶牛 SCC 之间的显著差异。1 号、2 号和 3 号牧场的 SCC 平均值分别为 7,055,266.67 cells/mL、2,619,893.33 cells/mL 和 552,000 cells/mL。根据结果,1 号场和 2 号场之间以及 1 号场和 3 号场之间的差异有统计学意义(p<0.05),而 2 号场和 3 号场之间的差异无统计学意义。除乳腺炎外,牛场 SCC 的差异还可能受到奶牛生产力、奇数、泌乳阶段和品种以及不良管理方法的影响。除控制乳腺炎外,改善卫生和适当的营养也有助于减少牛奶中的 SCs。总之,确定SCs模式可提供有用信息,有助于减少SCs和制定不同的SCs标准,以帮助获得低SCs牛奶,从而获得保质期更长的优质乳制品。
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Analysis of the Somatic Cell Pattern in Mastitis - Affected Cows on Three Dairy Farms in Vojvodina
Summary Somatic cells (SCs) in milk, which include epithelial cells from the gland and blood cells, are present in milk during the normal course of milking. Increase in SCs is found in mastitis-affected dairy cows and can be a useful indicator for estimating mammary health and milk quality worldwide. The aim of this study was to determine whether there was a pattern of somatic cell count (SCC) in mastitis-affected cows on three different farms. The study was conducted on three dairy farms of high milk-producing cattle breeds in Vojvodina during 2021. Samples were taken from 15 cows from each farm, all of the cows being diagnosed with clinical and subclinical mastitis. The SCC in milk samples was determined by the microscopic reference method according to the standard (SRPS EN ISO 13366-1:2010) of the Institute for Standardization of Serbia. The value of SCC was considered as high if >200.000 cells/mL, as this is the threshold indicating secretion disorder. In order to examine the differences between the observed three farms, one-factor analysis of variance (ANOVA) was applied, while a post-hoc LSD test was used for determination of statistically significant differences between the SCC in cows on three different farms. The mean values of the SCC on Farms 1, 2 and 3 were 7,055,266.67, 2,619,893.33 and 552,000 cells/mL, respectively. Based on the results, a statistically significant difference (p<0.05) was established between Farms 1 and 2, as well as between Farms 1 and 3, while there was no statistically significant difference between Farms 2 and 3. Apart from mastitis, differences in the SCC on the farms could also be influenced by the cows’ productivity, parity, lactation stage and breed, as well as poor management practices. Besides mastitis control, better hygiene and proper nutrition can help in reducing SCs in milk. In conclusion, establishing SCs pattern can provide useful information that may contribute to reducing SCs and developing differential SCs standards to help obtain milk with low SCs and consequently better dairy products with a longer shelf life.
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