engleski

Monitoring of metabolic parameters in plasma of dairy cows during puerperium

In our investigation, we monitored the levels of concentration of glucose, total proteins, bilirubin, urea and the activity of aspartat transaminase of the 45 dairy cows in the puerperium. The cows were from 5 husbandry which deal with producing the milk. We discovered folicular cysts in 19 cows by rectal and ultrasound examination 35 days post partum. 30 days post partum, the uterus and ovary findings were normal in 19 cows.The mean level of the glucose in the 33 cows was 3, 30 mM/L, in 2 cows it was below the lower limit (1, 60mM/L), while in 10 cows, the mean concentration was significantly beyond the physiologic values (7, 70mM/L).In the cows with folicular cysts the concentration of bilirubin was increased to 30%, while 26 cows with normal puerperium had 60% increased concentration in comparison with physiologic levels.The mean concentration of urea was increased in all 46 animals and its value was 7, 46mM/L.The mean value of activity of AST enzyme in the 19 cows with folicular cysts was 99, 16 U/L, while in the 26 cows with normal puerperium was 47, 19 U/L.The concentration of total proteins were within the physiologic limit and its mean value was 75, 32mM/L. We finally concluded that until day 35 of puerperium in the cows, there occurs an increase of bilirubin concentration as a result of increased activity of LDH izoenzyme 4+5.During the puerperium the concentration of urea was variable, although, the quantity of proteins in the forage was the same.The described metabolic changes, especially the plasma values of proteins are correlated with the liver activity.

cow; puerperium; glucose; bilirubin; urea; AST transaminase; total proteins

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