Metabolites and physical scores as possible predictors for postpartum culling in dairy cows

IF 2.2 3区 农林科学 Q1 VETERINARY SCIENCES
Kyoko Chisato , Takerou Yamazaki , Shuji Kayasaki , Rika Fukumori , Hidetoshi Higuchi , Kohei Makita , Shin Oikawa
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Abstract

The purpose of the study was to explore the associations of serum non-esterified fatty acids (NEFA) and β-hydroxybutyrate (BHBA) concentrations with the body condition score (BCS) and rumen fill score (RFS) in order to predict the risk of postpartum culling, and to further investigate effective monitoring stages during the dry period. From October 2012 to March 2014, clinically healthy Holstein heifers and cows were sampled once before calving, and the occurrence of culling within 60 days in milk (DIM) was investigated. The discriminatory ability of each parameter was evaluated using receiver operating characteristic (ROC) analysis. Of the 720 cows sampled between 14 and 2 days before the actual day of calving in the study, 42 cull cows (mean DIM ± SE: 22.0 ± 2.6) were confirmed. The areas under the curve (AUC) of the ROC for predicting culling using serum NEFA concentrations were 0.6 and 0.7 at 14 to 2 and 7 to 2 days before calving, respectively. The AUC for the RFS was 0.7 for both periods, indicating the same diagnostic level as the serum NEFA concentration. Both the serum NEFA concentration and RFS were possible predictors in cows with ≥ 2 parities, but not in cows with 0–1 parity sampled even at 7 to 2 days before calving. The serum BHBA concentration and BCS were not suitable predictors of culling for any period or parity. These results indicate that RFS has a discriminatory ability comparable to the serum NEFA concentration for predicting culling within 60 DIM.

代谢物和体能评分是奶牛产后淘汰的可能预测因素
该研究旨在探讨血清非酯化脂肪酸(NEFA)和β-羟基丁酸(BHBA)浓度与体况评分(BCS)和瘤胃充盈度评分(RFS)的关联,以预测产后宰杀风险,并进一步研究干奶期的有效监测阶段。从 2012 年 10 月到 2014 年 3 月,对临床健康的荷斯坦小母牛和奶牛在产犊前进行了一次采样,并调查了产后 60 天(DIM)内的宰杀发生率。使用接收器操作特征(ROC)分析评估了各参数的判别能力。在实际产犊日前 14 至 2 天采样的 720 头奶牛中,有 42 头奶牛(平均 DIM ± SE:22.0 ± 2.6)被证实为阉牛。利用血清 NEFA 浓度预测淘汰的 ROC 曲线下面积 (AUC) 在产犊前 14 至 2 天和 7 至 2 天分别为 0.6 和 0.7。RFS的AUC在这两个时期均为0.7,表明诊断水平与血清NEFA浓度相同。血清NEFA浓度和RFS均可预测产仔数≥2的奶牛,但不能预测产仔数为0-1的奶牛,即使在产犊前7-2天采样也不能预测。血清 BHBA 浓度和 BCS 都不能预测任何时期或任何奇数的淘汰。这些结果表明,在预测60 DIM内的淘汰方面,RFS的鉴别能力与血清NEFA浓度相当。
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来源期刊
Research in veterinary science
Research in veterinary science 农林科学-兽医学
CiteScore
4.40
自引率
4.20%
发文量
312
审稿时长
75 days
期刊介绍: Research in Veterinary Science is an International multi-disciplinary journal publishing original articles, reviews and short communications of a high scientific and ethical standard in all aspects of veterinary and biomedical research. The primary aim of the journal is to inform veterinary and biomedical scientists of significant advances in veterinary and related research through prompt publication and dissemination. Secondly, the journal aims to provide a general multi-disciplinary forum for discussion and debate of news and issues concerning veterinary science. Thirdly, to promote the dissemination of knowledge to a broader range of professions, globally. High quality papers on all species of animals are considered, particularly those considered to be of high scientific importance and originality, and with interdisciplinary interest. The journal encourages papers providing results that have clear implications for understanding disease pathogenesis and for the development of control measures or treatments, as well as those dealing with a comparative biomedical approach, which represents a substantial improvement to animal and human health. Studies without a robust scientific hypothesis or that are preliminary, or of weak originality, as well as negative results, are not appropriate for the journal. Furthermore, observational approaches, case studies or field reports lacking an advancement in general knowledge do not fall within the scope of the journal.
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