Schumann F J, Townsend H G, Naylor J M
Department of Herd Medicine and Theriogenology, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon.
Can J Vet Res. 1990 Jun;54(3):366-72.
A case-study involving 56 randomly selected beef herds in Alberta was conducted to assess the association of a number of suspected risk factors upon the odds of a high mortality from diarrhea among calves less than 30 days of age. Using stepwise logistic regression it was found that an increased percentage of heifers calving in the herd, poor drainage in the nursing area, providing limited shelter in the nursing area, a large calving area, and wintering cows and heifers on the same ground were conditionally associated with an increase in the odds of high mortality from neonatal diarrhea.
开展了一项涉及阿尔伯塔省56个随机选取的肉牛群的案例研究，以评估一些疑似风险因素与30日龄以下犊牛腹泻高死亡率几率之间的关联。通过逐步逻辑回归发现，牛群中初产小母牛产犊百分比增加、保育区排水不畅、保育区遮蔽物有限、产犊区域大以及母牛和小母牛在同一地面越冬与新生犊牛腹泻高死亡率几率增加存在条件关联。
