Erb H N
Can Vet J. 1987 Jun;28(6):326-9.
Epidemiological evidence is presented in order to answer two questions. The first question is: "Does high milk production put a cow at increased risk of disease?" The answer to this question seems to be "maybe" for milk fever, but "no" for most other common diseases (veterinary-assisted dystocia, retained placenta, metritis, cystic ovary, ketosis, left displaced abomasum, and mastitis). The second question is: "Is low milk production a consequence of disease?" For most diseases the answer is a cautious "yes".
为回答两个问题提供了流行病学证据。第一个问题是:“高产奶量会增加奶牛患病风险吗?”对于产乳热,这个问题的答案似乎是“也许”,但对于大多数其他常见疾病(兽医辅助难产、胎盘滞留、子宫炎、卵巢囊肿、酮病、真胃左方变位和乳腺炎),答案是“不会”。第二个问题是:“低产奶量是疾病的结果吗?”对于大多数疾病,答案是谨慎的“是”。