Association of abnormal hind-limb postures and back arch with gait abnormality in dairy cattle
Association of abnormal hind-limb postures and back arch with gait abnormality in dairy cattle
复制标题
DOI：
10.3168/jds.2013-7528
复制
发表时间：
2014-04-01
影响因子：
3.5
通讯作者：
Wenz, J. R.
中科院分区：
文献类型：
--
作者：
Hoffman, A. C.;Moore, D. A.;Wenz, J. R.
检测每头奶牛的跛行对于迅速治疗这种痛苦和限制生产的疾病是很重要的。目前检测跛行的方法包括观察奶牛行走几步。如果能够更方便地观察到跛行的临床迹象，因为奶牛在站立时正在接受定期的检查，检测水平可能会提高。本研究的目的是评估奶牛在立柱上站立时的姿势与临床跛行之间的关系，并评价这些姿势的观察作为跛行的测试。这项研究包括来自4个农场的1243头奶牛。观察奶牛在立柱上站立进行常规管理程序的情况，并记录下拱背和牛膝、宽站姿和偏肢姿势的存在。同样的奶牛在离开挤奶厅时也被打了移动分。随着跛行严重程度的增加(较高的运动得分)，观察到的背弓、蹄关节和偏肢姿势的奶牛所占比例增加，但宽站姿的奶牛比例并没有增加。对于存在这些姿势作为跛行的测试(运动评分=3)，敏感性和特异性分别为0.63和0.64的背弓，0.54和0.57的奶牛飞节，0.05和0.98的偏爱的四肢。后弓、牛膝和偏爱的四肢姿势与跛行有关，但不像诊断试验那样高度敏感或特异。然而，观察后弓可能有助于识别需要进一步检查的奶牛。
Detection of lameness in individual cows is important for the prompt treatment of this painful and production-limiting disease. Current methods for lameness detection involve watching cows walk for several strides. If clinical signs predictive of lameness could be observed more conveniently, as cows are undergoing regularly scheduled examinations while standing, detection levels could increase. The objective of this study was to assess the association between postures observed while cows are standing in stanchions and clinical lameness evaluated by locomotion scoring, and to evaluate the observation of these postures as a test for lameness. The study included 1,243 cows from 4 farms. Cows were observed while standing in stanchions for regularly scheduled management procedures and the presence of arched back and cow-hocked, wide-stance, and favored-limb postures were recorded. The same cows were locomotion-scored as they exited the milking parlor. The proportion of cows observed with arched back and cow-hocked and favored-limb postures increased with increasing severity of lameness (higher locomotion score) but did not increase for the wide-stance posture. For the presence of these postures as a test for lameness (locomotion score >= 3), sensitivity and specificity were 0.63 and 0.64 for back arch, 0.54 and 0.57 for cow hocks, and 0.05 and 0.98 for favored limb. Back-arched, cow-hocked, and favored limb postures were associated with lameness but were not highly sensitive or specific as diagnostic tests. However, observation of back arch may be useful to identify cows needing further examination.