Effects of road transportation on metabolic and immunological responses in Holstein heifers

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• 作者：Hyeok-Joong Kang ; In Kyu Lee ; Min-Yu Piao ; Chae-Won Kwak ; Min Jeong Gu ; Cheol Heui Yun ; Hyun-Jin Kim ; Hyeon-Ju Ahn ; Hee-Bal Kim ; Gyeom-Heon Kim ; Soo-Ki Kim ; Jong-Youl Ko ; Jong K. Ha and Myunggi Baik
• 刊名：Animal Science Journal
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：88
• 期：1
• 页码：140-148
• 全文大小：385K
• ISSN：1740-0929

文摘

This study examined the effects of road transportation on metabolic and immunological responses in dairy heifers. Twenty Holstein heifers in early pregnancy were divided into non-transported (NT; n = 7) and transported (T; n = 13) groups. Blood was collected before transportation (BT), immediately after transportation for 100 km (T1) and 200 km (T2), and 24 h after transportation (AT). The T heifers had higher (P < 0.05) blood cortisol and non-esterified fatty acid concentrations after T1 and T2 than did NT heifers. By contrast, the T heifers had lower (P < 0.05) serum triglyceride concentrations after T1 and T2 than had the NT heifers. The serum cortisol and triglyceride concentrations returned (P > 0.05) to the BT concentrations at 24 h AT in the T heifers. The granulocyte-to-lymphocyte ratio and the percentage of monocytes were higher (P < 0.05) after T2 in the T heifers than in the NT heifers, suggesting that transportation stress increased the numbers of innate immune cells. T heifers had higher (P < 0.01) plasma haptoglobin concentrations than NT heifers 24 h AT. In conclusion, transportation increased cortisol secretion and was correlated with increased metabolic responses and up-regulation of peripheral innate immune cells in dairy heifers.