Gearhart M A, Curtis C R, Erb H N, Smith R D, Sniffen C J, Chase L E, Cooper M D
Colorado State University, Fort Collins 80523.
J Dairy Sci. 1990 Nov;73(11):3132-40. doi: 10.3168/jds.S0022-0302(90)79002-9.
The relationship of body condition score with disease occurrence was examined in 561 cows in nine herds. Cows were body condition scored on a five-point scale (1 = thin, 5 = obese) every 2 wk from drying off until 150 d in milk. Cows scored between 3- and 3+ were considered to be in average or good condition. Cows scored less than or equal to 2+ were considered to be underconditioned, whereas those scored greater than or equal to 4- were considered to be overconditioned. Relationships of health and condition score were examined using multiple logistic regression for dichotomous outcomes (e.g., diseased or healthy). Cows that developed dystocia or were culled lost more condition during the dry period than those that did not develop dystocia or were not culled. Cows overconditioned at drying off were more likely to develop cystic ovarian disease and reproductive problems. Cows underconditioned or overconditioned at drying off were more prone to foot problems after calving. Cows overconditioned at 30 d postpartum were more likely to have metritis.
在9个牛群的561头奶牛中研究了体况评分与疾病发生之间的关系。从干奶期到产奶150天，每隔2周对奶牛进行一次体况评分，评分采用五分制（1 = 消瘦，5 = 肥胖）。体况评分为3至3+的奶牛被认为处于平均或良好状态。体况评分小于或等于2+的奶牛被认为体况不佳，而评分大于或等于4-的奶牛被认为体况过佳。使用多因素逻辑回归分析二分结局（如患病或健康）来研究健康与体况评分之间的关系。发生难产或被淘汰的奶牛在干奶期比未发生难产或未被淘汰的奶牛体况下降更多。干奶期体况过佳的奶牛更易发生卵巢囊肿疾病和繁殖问题。干奶期体况不佳或过佳的奶牛在产犊后更易出现蹄部问题。产后30天体况过佳的奶牛更易患子宫内膜炎。
