Matias B F, Filho L F C Cunha, Rego F C A, Barreto J V P, Reis L S L S, Queiroz A T Z, Queiroz G R
Master´s Degree in Animal Health and Production, Pitágoras Unopar University, Arapongas, PR, Brazil.
University of Western Paulista, Sao Paulo, Brazil.
Vet World. 2020 Dec;13(12):2612-2617. doi: 10.14202/vetworld.2020.2612-2617. Epub 2020 Dec 9.
To establish prevention strategies, recording the prevalence of foot injuries within a herd should be the starting point in determining the risk factors involved in digital diseases. This study aimed to assess the prevalence of claw disorders in lactating Jersey cows raised in a semi-confinement system.
Five hundred and eighty-four digits were examined from 73 lactating Jersey cows. The lameness score system was used to assess each cow while walking and on standing position, and digital lesions were evaluated with the cows restrained in a hydraulic cattle chute.
The prevalence of digital lesions was 93.1%. Among the 68 affected cows, only 21 were lame. Of the 584 digits examined, 970 lesions were recorded, corresponding to 13.3% lesions per cow and 1.66% injuries per digit. Forty-eight cows (65.7%) had lesions in all digits, and 92.8% of digits had at least one lesion. Lesions in digits of fore limbs were more common (55.3%) (p<0.0001) than those of hind limbs (44.7%). Foot injuries in medial digits of the fore limbs were more prevalent (56.8%) (p<0.001) than in the lateral digits (43.2%). The lesions' occurrence was similar in both medial and lateral digits of the hind limbs (p=0.8347). The primary diseases observed were heel horn erosion (53.8%), white line disease (19.3%), and double sole (12.4%), which together accounted for 92.4% and 84.9% of foot disorders diagnosed in the fore and hind limbs, respectively. Other digital diseases occurred less frequently.
The prevalence of foot disorders in lactating Jersey cows raised in semi-confinement systems was high. This could be due to the lack of preventive trimming, infectious diseases, and nutritional problems.
为制定预防策略，记录牛群中足部损伤的患病率应是确定蹄部疾病相关风险因素的起点。本研究旨在评估在半封闭式系统中饲养的泌乳期泽西奶牛的蹄部疾病患病率。
对73头泌乳期泽西奶牛的584个蹄趾进行了检查。采用跛行评分系统在奶牛行走和站立时对每头奶牛进行评估，并在液压牛栏中对奶牛进行约束时评估蹄部病变。
蹄部病变的患病率为93.1%。在68头受影响的奶牛中，只有21头跛行。在检查的584个蹄趾中，记录到970处病变，相当于每头奶牛有13.3%的病变，每个蹄趾有1.66%的损伤。48头奶牛（65.7%）所有蹄趾都有病变，92.8%的蹄趾至少有一处病变。前肢蹄趾的病变更常见（55.3%）（p<0.0001），而后肢的病变为44.7%。前肢内侧蹄趾的足部损伤比外侧蹄趾更普遍（56.8%）（p<0.001）。后肢内侧和外侧蹄趾的病变发生率相似（p=0.8347）。观察到的主要疾病是蹄踵角质侵蚀（53.8%）、白线病（19.3%）和双蹄底（12.4%），它们分别占前肢和后肢诊断出的蹄部疾病的92.4%和84.9%。其他蹄部疾病发生频率较低。
在半封闭式系统中饲养的泌乳期泽西奶牛的蹄部疾病患病率很高。这可能是由于缺乏预防性修蹄、传染病和营养问题所致。
