کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2454974 | 1110498 | 2014 | 6 صفحه PDF | دانلود رایگان |
• Calves that were weaned show a stronger physiological stress response than control calves.
• Neutrophil number is a robust biomarker of stress and additionally that plasma CXCL8 is a sensitive indicator of stress in weaned calves.
• In future studies, these two biomarkers should be central to the characterisation of stress responses.
The study objective was to investigate the physiological effects of weaning on beef calves and identify a panel of blood-based welfare biomarkers. On the day (d) of weaning (d 0), 16 spring-born, single-suckled, beef bull calves that previously grazed with their dams at pasture, were assigned to one of two treatments: (1) control (n = 8), calves were loose-housed with their dam, (2) weaned (n = 8), calves were abruptly separated from their dam and loose-housed. Jugular blood was collected on d −4, 0, 1, 2, 3, 7, and 14 relative to weaning (d 0) and assayed for inflammatory and steroid variables. Total leukocyte counts were measured in whole blood. It is concluded that neutrophil number is a robust biomarker of stress and that plasma CXCL8 is a sensitive indicator of stress in weaned and control calves. In future studies, these two biomarkers should be central to the characterisation of stress responses.
Journal: Research in Veterinary Science - Volume 97, Issue 2, October 2014, Pages 458–463