Association between a visual and an automated locomotion score in lactating holstein cows
Association between a visual and an automated locomotion score in lactating holstein cows
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DOI：
10.3168/jds.2007-0076
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发表时间：
2007-07-01
影响因子：
3.5
通讯作者：
Guard, C. L.
中科院分区：
文献类型：
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作者：
Bicalho, R. C.;Cheong, S. H.;Guard, C. L.
两项研究评估了视觉运动评分（VLS）和Stepmetrix运动评分（SLS）在检测手指疼痛病变中的作用。在研究1中，一名兽医进行了VLS。对VLS >= 3的奶牛进行马蹄修剪，并记录是否存在疼痛病变（PL），定义为对指压的反应。随着VLS的增加，泌乳率呈明显上升趋势。VLS 1 ~ 5组出现疼痛病变的奶牛比例分别为5.6% （n = 53）、20.1% （n = 78）、55.5% （n = 164）、79.9% （n = 159）和100% （n = 5）。研究2在另一个农场进行。当天由3名兽医对整个农场进行视觉运动评分，并通过Stepmetrix系统对奶牛进行Stepmetrix运动评分。在接下来的2天里，每头奶牛都由8名专业修蹄师中的1名修蹄。3名兽医识别、评分并记录任何PL。3名兽医的观察者间一致性kappa系数在0.45和0.48 +/- 0.05之间。共有518头奶牛被用于分析，其中11.2%被鉴定为PL。在被诊断为PL的奶牛中，32.8%被检测出鞋底溃疡，25.9%被检测出白线病，13.8%被检测出白线脓肿，27.5%被检测出其他疾病。进行了接收机工作特性分析；VLS的曲线下面积（0.80,95%可信区间为0.76 ~ 0.83）大于SLS（0.62, 95%可信区间为0.57 ~ 0.66）。当由训练有素的兽医执行时，VLS在检测PL方面优于SLS。
Two studies were conducted to evaluate visual locomotion scoring (VLS) and Stepmetrix locomotion scoring (SLS) in detecting painful digit lesions. In study 1, one veterinarian performed VLS. Cows with VLS >= 3 were hoof trimmed and the presence or absence of a painful lesion (PL), defined as a reaction to digital pressure, was recorded. A strongly increasing pattern in the proportion of cows with PL was detected as VLS increased. The proportions of cows with painful lesions were 5.6% (n = 53), 20.1% (n = 78), 55.5% (n = 164), 79.9% (n = 159), and 100% (n = 5) for VLS 1 to 5, respectively. Study 2 was conducted on a different farm. The entire farm was visually locomotion scored by 3 veterinarians on the same day, and the cows were Stepmetrix locomotion scored by walking through the Stepmetrix system. Every cow was trimmed during the following 2 d by I of 8 professional hoof trimmers. The 3 veterinarians identified, scored, and recorded any PL. Interobserver agreement for the 3 veterinarians had a kappa coefficient of between 0.45 and 0.48 +/- 0.05. In total, 518 cows were used in the analysis, from which 11.2% were identified with a PL. Of the cows diagnosed with a PL, 32.8% were detected with a sole ulcer, 25.9% with white line disease, 13.8% with white line abscess, and 27.5% with other diseases. A receiver operating characteristic analysis was performed; the area under the curve was larger for VLS (0.80; 95% confidence interval, 0.76 to 0.83) than SLS (0.62; 95% confidence interval, 0.57 to 0.66). When performed by trained veterinarians, VLS performed better than SLS in detecting PL.