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首页> 外文期刊>Revue de Medecine Veterinaire >Pathomorphological investigations on the incidence of clinical spondylolisthesis (kinky back) in different commercial broiler strains
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Pathomorphological investigations on the incidence of clinical spondylolisthesis (kinky back) in different commercial broiler strains

机译：不同商业肉鸡品系临床脊椎滑脱（扭结）发病率的病理形态学研究

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The aim of the present study was to investigate the incidence of spondylolisthesis in broiler chickens of 3 commercial hybrids (Ross 308, Cobb 500 and Pureline) from the same fattening farm. The discovered chickens with typical signs of spondylolisthesis (posterior paralysis) in each flock of 17.000 birds were registered, marked, and separated in an isolator, where they were kept with constant access to food and water until the time at the respective flock was slaughtered. The mean ages at which clinical signs of the disease appeared were 26.6 days for Ross 308, 28.2 days for Cobb 500, and 27.5 days for Pureline. The overall posterior paralysis prevalence was 0.17% (571 affected chickens from the 3 examined hybrids) and a higher incidence was recorded in Cobb 500 (0.24%) than in Ross 308 (0.14%) and in Pureline (0.13%). No significant correlation was established between spondylolisthesis occurrence and breeder ages or the earliest day of disease detection. Gross and conventional histological examination of spine samples (10 from each flock) revealed spondylolisthesis lesions (ventral dislocation of T4 (4lh thoracic vertebra)) in 57.8% of samples, mainly in Cobb 500 hybrids (66.7% of samples) and spondylosis (degenerative lesions nearT4 and T5) in33.9% samples. These results suggest that despite a significant selection work primarily aimed at a shorter fattening period, there were no variations in the age occurrence of spondylolisthesis.
机译：本研究的目的是调查来自同一育肥场的3种商品杂种（罗斯308，科布500和Pureline）的肉鸡脊椎滑脱的发生率。在每只17.000只鸡群中发现的具有典型腰椎滑脱症状（后麻痹）的鸡被记录，标记并隔离在隔离器中，在这些鸡中不断获取食物和水，直到屠宰各个鸡群为止。出现该疾病临床征象的平均年龄，Ross 308为26.6天，Cobb 500为28.2天，Pureline为27.5天。整体后瘫患病率为0.17％（来自3个受检杂种的571只受影响的鸡），Cobb 500（0.24％）的发生率高于Ross 308（0.14％）和Pureline（0.13％）。在腰椎滑脱发生与育种年龄或疾病最早发现之间没有显着相关性。脊柱样本的大体和常规组织学检查（每组10个）显示脊椎滑脱病变（T4腹侧脱位（4lh胸椎））在样本中占57.8％，主要是在Cobb 500杂种中（样本占66.7％）和脊椎病（变性病变）在33.9％的样本中接近T4和T5）。这些结果表明，尽管主要针对较短的育肥期进行了大量的选择工作，但脊椎滑脱的年龄没有变化。

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