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Relationship between nutrient metabolism during the periparturient period and health measures in a Pacific Northwest dairy herd.

C. Y. Tsai

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06-22-2020

Abstract:

68
Relationship between nutrient metabolism during the periparturient period and health measures in a Pacific Northwest dairy herd.
C. Y. Tsai*1, H. H. Hung1, T. Weber1, W. J. Price2, P. Rezamand1. 1Department of Animal and Veterinary Science, University of Idaho Moscow, ID, 2Statistical Programs, College of Agricultural and Life Sciences, University of Idaho Moscow, ID.

During the periparturient period, dairy cows mobilize stored nutrients to support fetal development and milk production. The objective of the present study was to determine the relationship between the serum lipid-soluble vitamins of dairy cows and calves with health status of the cows during the periparturient period. Blood samples of cows were obtained from early Spring to Winter of 2018 for a total of 645 periparturient cows on d −21, d −7, d 1, d 7 and d 14 relative to calving. Blood samples of calves were obtained (n = 459) within the first 4 d of life. Sera were analyzed for lipid-soluble vitamins (α-tocopherol, β-carotene, and retinol) via HPLC. Health records were categorized based on the occurrence of postpartum diseases (lameness, mastitis, pneumonia). The data were analyzed using linear mixed models and correlations in SAS with significance declared at P ≤ 0.05 and tendency when P < 0.1. Results showed that cows with mastitis had greater serum retinol compared with that of healthy cows postpartum (P < 0.01). There was some evidence of a serum α-tocopherol time � mastitis interaction (P = 0.08). There was a significant interaction between the time relative to calving and season on serum α-tocopherol, β-carotene, and retinol concentration regardless of health status (P < 0.001). For mastitic cows, there were negative correlations for serum retinol and β-carotene between cows and calves on d 14 postpartum. In addition, negative correlations were observed between cows and calves for lameness (β-carotene) and pneumonia (α-tocopherol) on d 14 postpartum. In summary, disease affects the lipid soluble vitamins status of periparturient cows, and consequently calves may experience health issues.

Keywords: lipid-soluble vitamin, health status, dairy cow.

Biography: Ph.D. student working with dairy cows in epidemiology and diseases.