McCoy M A, Reilly G A, Kilpatrick D J
Veterinary Sciences Division, Department of Agriculture for Northern Ireland, Stormont, Belfast.
Res Vet Sci. 1996 Mar;60(2):185-6. doi: 10.1016/s0034-5288(96)90017-x.
The incidence of deaths attributable to cage layer osteoporosis (CLO) and the associated parameters of bone strength were studied in a flock of 5000 commercial laying hens over one laying cycle. Of the 9.7 per cent mortality rate, 35 per cent were attributed to CLO, and the mean age of death of the CLO hens (45.5 weeks) was significantly earlier than that of the non-CLO hens (51.6 weeks). There was a significant linear relationship between the density and breaking strength of whole bones with no difference between the CLO and non-CLO hens. However, the density and breaking strength of the bones of the non-CLO hens were consistently greater than those of the CLO hens. The density and breaking strength of the bones of both groups of birds increased with age.
在一个产蛋周期内，对一群5000只商品蛋鸡进行了研究，以确定笼养蛋鸡骨质疏松症（CLO）所致死亡的发生率以及骨强度的相关参数。在9.7%的死亡率中，35%归因于CLO，CLO母鸡的平均死亡年龄（45.5周）明显早于非CLO母鸡（51.6周）。全骨密度和断裂强度之间存在显著的线性关系，CLO母鸡和非CLO母鸡之间无差异。然而，非CLO母鸡骨骼的密度和断裂强度始终高于CLO母鸡。两组鸡骨骼的密度和断裂强度均随年龄增长而增加。
