Université Paris Est, Ecole Nationale Vétérinaire d'Alfort, USC, ENVA-ANSES, Epidémiologie des Maladies Animales Infectieuses, F-94700 Maisons-Alfort, France.
Vet J. 2013 Jul;197(1):72-6. doi: 10.1016/j.tvjl.2013.03.044. Epub 2013 Apr 30.
Several studies have demonstrated a statistical association between management practices and juvenile osteochondral conditions (JOCC) in foals from birth to 6months of age, but this association has not been investigated in yearlings. The purpose of the current study was to determine the adjusted effects of management practices on the onset and evolution of JOCC in French yearlings. The study sample consisted of 259 yearlings born on 20 stud farms in Normandy. The breeding conditions of these horses were monitored from 6 to 17months. They were radiographed at 6 and 17months to determine their radiographic score (RS) and its evolution. Potential risk factors were investigated using univariate and multivariate analyses. The prevalence of JOCC was 48% at 6months and 42% at 17months. Between 6 and 17months, the RS changed (for better or worse) in 52% of yearlings. The main risk factors leading to deterioration in the RS were traumatic. 'Mixed housing' during winter, pastures with rough ground and a bad RS at 6months were significantly associated with deterioration in RS between 6 and 17months. In the multivariate analysis, the breed was not significantly associated with any evolution in the yearlings' RS. This study provides some indications on protective measures to prevent the worsening of JOCC lesions between 6 and 17months, a crucial period since it precedes the sale of yearlings and the beginning of training.
一些研究表明，在出生至 6 月龄的小马驹中，管理实践与幼年骨软骨病（JOCC）之间存在统计学关联，但这种关联尚未在 1 岁马驹中进行研究。本研究的目的是确定管理实践对法国 1 岁马驹 JOCC 发病和演变的调整影响。研究样本包括在诺曼底 20 个种马场出生的 259 匹 1 岁马驹。这些马的繁殖条件从 6 月龄到 17 月龄进行监测。它们在 6 月龄和 17 月龄时进行放射照相以确定其放射照相评分（RS）及其演变。使用单变量和多变量分析研究了潜在的危险因素。6 月龄时 JOCC 的患病率为 48%，17 月龄时为 42%。在 6 至 17 月龄之间，52%的马驹 RS 发生变化（变好或变坏）。导致 RS 恶化的主要危险因素是创伤性的。冬季“混合饲养”、地面粗糙的牧场以及 6 月龄时 RS 较差与 6 至 17 月龄之间 RS 的恶化显著相关。在多变量分析中，品种与 1 岁马驹 RS 的任何演变均无显著相关性。本研究提供了一些关于预防 6 至 17 月龄之间 JOCC 病变恶化的保护措施的信息，这是一个关键时期，因为它先于 1 岁马驹的销售和训练开始。
