Biochemical parameters for evaluation of renal function and fluid and electrolyte balance of healthy female Holstein calves during the first month of life
AbstractThree hundred healthy female Holstein calves were used for assess the renal function and electrolyte balance throughout the first month of life. Calves were distributed through 15 experimental group, according to age. The influence of age on the biochemical values was also studied. The serum concentration of urea oscillated throughout the study, reaching the highest value on the 4th day of life (31,85 mg/dl) and reaching the lowest values on calves with 15-20 days of life. Similarly, serum creatinine had highest values on the group of youngest animals (group 1 - 2,65 mg/dl), followed by oscillations and a continuing decrease until it reached the lowest values on older animals (group 15 - 1,28 mg/dl). The sodium concentrations had few oscillations until 15 days of life when it had the lowest value (125,9 mEq/l); thereafter it was observed a significant increase with the highest value between 20th and 25th day of life (141,5 mEq/l). For the serum potassium, the lowest value was observed on younger animals (group 1 - 4,30 mEq/l), followed by a significant increase until the highest value between the 5th and 9th day of life (5,27 mEq/l). Ageing showed a significant influence on all the biochemical variables studied with exception for chloride ion concentration.
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