Predictors and impacts of colostrum consumption by 4h after birth in newborn beef calves.

Autor: Homerosky ER; Department of Production Animal Health, University of Calgary Faculty of Veterinary Medicine, 3330 Hospital Dr. NW, Calgary, AB, T2N 4N1, Canada., Timsit E; Department of Production Animal Health, University of Calgary Faculty of Veterinary Medicine, 3330 Hospital Dr. NW, Calgary, AB, T2N 4N1, Canada., Pajor EA; Department of Production Animal Health, University of Calgary Faculty of Veterinary Medicine, 3330 Hospital Dr. NW, Calgary, AB, T2N 4N1, Canada., Kastelic JP; Department of Production Animal Health, University of Calgary Faculty of Veterinary Medicine, 3330 Hospital Dr. NW, Calgary, AB, T2N 4N1, Canada., Windeyer MC; Department of Production Animal Health, University of Calgary Faculty of Veterinary Medicine, 3330 Hospital Dr. NW, Calgary, AB, T2N 4N1, Canada. Electronic address: c.windeyer@ucalgary.ca.
Jazyk: angličtina
Zdroj: Veterinary journal (London, England : 1997) [Vet J] 2017 Oct; Vol. 228, pp. 1-6. Date of Electronic Publication: 2017 Sep 14.
DOI: 10.1016/j.tvjl.2017.09.003
Abstrakt: Newborn beef calf vigor is a vital survival characteristic that promotes timely colostrum consumption. Modified APGAR scores intended to identify compromised calves are not widely adopted due to impracticality, inconsistent associations with blood gas disturbances, and unclear recommendations for intervention. The objectives were to: (1) determine differences in at-birth blood parameters between calves that were successful in colostrum consumption by 4h (CC4) compared to those that failed; (2) develop a Beef Calf Vigor Assessment by determining calving characteristics and clinical examination parameters associated with CC4; and (3) evaluate impacts of failed CC4 on transfer of passive immunity and treatment risk. As a predictor for CC4, suckle reflex had the highest specificity (98%), whereas calving ease had the highest sensitivity (89%). Calves with a weak suckle reflex had 41.6 (95% CI: 7.4-787.5) times greater odds of failed CC4 compared to calves with a strong suckle reflex (P<0.0001). Calves with failed CC4 had lower serum IgG (P=0.01), had lower odds of acquiring optimal passive immunity (>24g/L serum IgG; OR=6.4, 95% CI: 1.2-34.4; P=0.02), and higher odds of being treated (OR=2.8, 95% CI: 1.1-7.4; P=0.03) than those that succeeded. Measuring suckle reflex in combination with calving ease was a quick and easy method to assess newborn beef calf vigor. The value of this Beef Calf Vigor Assessment was further emphasized by the negative impacts of failed CC4 on transfer of passive immunity and pre-weaning health.
(Copyright © 2017 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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