奶牛产后瘫痪的诊治及防备(国外英文资料).docVIP

奶牛产后瘫痪的诊治及预防 The diagnosis and prevention of postpartum paralysis Abstract: cows postpartum paralysis is also called milk fever, is a kind of adult cows in happened before and after childbirth nutrition metabolic disease, is one of the cows often onset, generally in 5-8 ages (3 to 7 times) of high producing dairy cows, delivery within 72 hours before and after the onset is usually in cows, milk yield is higher, come on, the more generally in 5-8%, the incidence of all have happen all the year round, is sending out. Clinically, it is characterized by decreased blood calcium concentration, muscle weakness, paralysis and coma. ? The reason of disease of 1 Although the exact mechanism of postpartum paralysis remains not clear, but it is considered that dry milk issue raised mismanagement and childbirth and blood calcium reduced quickly after childbirth is induced direct cause of the disease. Dry milk stage, especially antenatal feeding high calcium diet, make the improper proportion of calcium phosphate, too much calcium reduce secreted by the parathyroid, affect calcium absorption and bone calcium use ability. ? During childbirth, the cortex is overexcited, and the postpartum is inhibited, which reduces calcium absorption and reduces the amount of calcium in the blood. And the decrease in blood calcium can deepen the inhibitory degree of the nervous system, the two affect each other, the vicious circle, the blood calcium precipitates rapidly, the disease rapidly deteriorates. After childbirth, female energy loss is large, appetite and digestion and absorption function abate, cause calcium absorption weakened, but due to postpartum lactation, produced the first day of postpartum blood calcium consumption is more, a lot of calcium into the colostrum, then with the colostrum, causing a significant drop in blood calcium content. Caused by low blood calcium parathyroid function disorder, is not fully mobilize bone calcium into the blood, to supplement blood calcium cant ti