奶牛低血钙抽搐系由于血浆中钙过低(低于9—11毫克％)或由于钙磷比例失调引起的以抽搐症状为特征的代谢性疾病。此病多发于产后2～3周,泌乳量增高的开始阶段,初期后肢僵硬,步态摇摆,迅即仆倒,继而四肢伸出,躺卧一侧,头向后背,有时做游泳姿势,横卧不起,牙关紧闭,全身肌肉痉挛,瞳孔散大,眼球转动,震颤而后翻,时而呻吟,持续时间长短不一;短则十分;长则几小 Hypoglycemic convulsions in dairy cows are metabolic diseases characterized by seizures as a result of hypocalcaemia in the plasma (below 9-11 mg%) or due to imbalance of calcium and phosphorus. The disease occurs in postpartum 2 to 3 weeks, the initial stage of increased milk yield, early hind limb stiffness, gait swing, and soon fell to his knees, then stretched out, lying on one side, head back, and sometimes do swimming posture, horizontal Can not lie down, teeth closed, whole body muscle spasms, mydriasis, eye rotation, tremor and then turn, and sometimes groan, the duration of different lengths; very short; long few