Association between changes in plasma calcium concentration and plasma tartrate-resistant acid phosphatase activity in periparturient cows.
Eight periparturient Holstein Friesian cows were examined for plasma tartrate-resistant acid phosphatase (TRAP) activity to assess the degree of bone metabolic activity and to evaluate the association between the change in calcium (Ca) concentration and bone metabolism during the periparturient period. Milk fever occurred in 1 of 8 cows just after parturition. Plasma TRAP activities did not markedly change in 5 of 8 cows during the experimental period. The changing rate of Ca between preparturition and just after parturition was under -20% in 3 of 8 cows, and low TRAP activities were observed in 2 of these 3 cows. This study suggests that cows with a low TRAP activity are at risk of developing milk fever in comparison to cows with high TRAP activity. Temporary increases of parathyroid hormone were observed in 7 cows, but not in the cow with milk fever.
Sato
Jun
J
Department of Clinical Veterinary Medicine, Faculty of Agriculture, Iwate University.
Sato
Reeko
R
Takagi
Aiko
A
Goto
Taichi
T
Okada
Keiji
K
Yasuda
Jun
J
Naito
Yoshihisa
Y
D000135:Acid Phosphatase / Q000097:blood*; D000818:Animals; D001842:Bone and Bones / Q000378:metabolism; D002118:Calcium / Q000097:blood*; D002417:Cattle; D002418:Cattle Diseases / Q000097:blood* / Q000201:enzymology / Q000378:metabolism; D005260:Female; D007527:Isoenzymes / Q000097:blood*; D010281:Parathyroid Hormone / Q000097:blood; D010319:Parturient Paresis / Q000097:blood* / Q000201:enzymology / Q000378:metabolism; D036801:Parturition; D011247:Pregnancy; D012307:Risk Factors; D000071681:Tartrate-Resistant Acid Phosphatase
D007527:Isoenzymes; D010281:Parathyroid Hormone; D000135:Acid Phosphatase; D000071681:Tartrate-Resistant Acid Phosphatase; D002118:Calcium