【摘 要】
：
通过一个试验,研究集约化饲养条件下不同屠宰日龄(47～65 d)的两个商品肉鸡品系(罗斯508和Cobb 500)胸深肌病(deep pectoral myopathy,DPM)的发病率.试验在意大利一家一流的家
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通过一个试验,研究集约化饲养条件下不同屠宰日龄(47～65 d)的两个商品肉鸡品系(罗斯508和Cobb 500)胸深肌病(deep pectoral myopathy,DPM)的发病率.试验在意大利一家一流的家禽加工厂进行,在为期6个月的试验期内随机从151个屠宰肉鸡群中选取120 700羽肉用公鸡,根据胸小肌有无眼观肌病以及肌肉损伤的病变程度(分发病早期(表现为出血)和发病后期(灰色或绿色)对肉鸡的DPM进行评估.检测表明,各肉鸡群屠体的DMP总体发病率平均为0.84%(其中处于发病早期和发病晚期的屠体比例分别为0.62%和0.22%),各试验肉鸡群之间的DPM发病率波动幅度很大(0%～16.7%),另外处于发病早期和发病晚期的肉鸡所占比例变化也很大,分别为0%～12.0%和0%～5.6%;对两个肉鸡品种的DMP发病率比较后发现,罗斯508肉鸡的发病率高于Cobb 500肉鸡(P≤0.01),该结果是由于罗斯508肉鸡的DMP发病早期(0.94%(罗斯508)对0.26%(Cobb 500),P≤0.01)和发病后期(0.33%对0.09%,P≤0.01)比例均高于Cobb 500肉鸡.
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