2016
DOI: 10.2527/jas.2015-0192
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The metabolic, stress axis, and hematology response of zilpaterol hydrochloride supplemented beef heifers when exposed to a dual corticotropin-releasing hormone and vasopressin challenge1,2,3

Abstract: The objective of this study was to determine the metabolic, stress, and hematology response of beef heifers supplemented with zilpaterol hydrochloride (ZH) when exposed to an endocrine stress challenge. Heifers ( = 20; 556 ± 7 kg BW) were randomized into 2 treatment groups: 1) control (CON), no ZH supplementation, and 2) zilpaterol (ZIL), supplemented with ZH at 8.33 mg/kg (DM basis). The ZIL group was supplemented ZH for 20 d, with a 3-d withdrawal period. On d 24, heifers received an intravenous bolus of cor… Show more

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Cited by 8 publications
(1 citation statement)
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“…Heat stress is an important environmental stressor that can reduce efficiency in ruminant livestock. Alternatively, β-adrenergic agonists ( β-AA ) increase value due to increased efficiency in muscle growth ( Buntyn et al, 2016 ). Currently, there are two β-AA approved for use in livestock in the United States: zilpaterol HCl ( ZHCl ), a β2 agonist, and ractopamine HCl ( RHCl ), a β1 agonist ( Delmore et al, 2010 ; Boler et al, 2012 ).…”
Section: Introductionmentioning
confidence: 99%
“…Heat stress is an important environmental stressor that can reduce efficiency in ruminant livestock. Alternatively, β-adrenergic agonists ( β-AA ) increase value due to increased efficiency in muscle growth ( Buntyn et al, 2016 ). Currently, there are two β-AA approved for use in livestock in the United States: zilpaterol HCl ( ZHCl ), a β2 agonist, and ractopamine HCl ( RHCl ), a β1 agonist ( Delmore et al, 2010 ; Boler et al, 2012 ).…”
Section: Introductionmentioning
confidence: 99%