Association of feedlot disease treatments on the probability of heart disease syndrome in U.S. feedlot cattle

B. Johnson, D. Amrine, R. Larson, B. White
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引用次数: 2

Abstract

Data from 14 U.S. feedlots from January 1, 2017, through De­cember 31, 2020, were evaluated for disease treatment on the probability of being terminally diagnosed with heart disease (HD). The study objective was two-fold: 1) determine the as­sociation between the number of bovine respiratory disease (BRD) treatments (0,1,2,3+) and HD, and 2) determine the as­sociation of common feedlot disease treatment (AIP, BRD, Complex Disease, GI+Bloat, Other), and cohort demographics with HD. Data were analyzed using generalized mixed-effects models to evaluate the probability of terminal HD. Covariates of interest include: BRD treatments, feedlot disease category, average cohort arrival weight, arrival year, arrival quarter, feedlot elevation and sex. The number of BRD treatments was associated with HD (P < 0.01). Cattle requiring additional BRD treatments increased their probability of not finishing the feeding period due to HD. The magnitude of this association was influenced by average cohort arrival weight, feedlot eleva­tion, sex and arrival quarter (P < 0.01). Feedlot disease catego­ries were associated with the probability of not finishing the feeding phase due to a HD diagnosis (P < 0.01). The magnitude of this association was influenced by average cohort arrival weight, and feedlot elevation (P < 0.01). Sex was influenced by feedlot elevation on the probability of not finishing due to HD diagnosis (P < 0.01) with higher elevations having a greater probability of HD. The majority of HD cattle were railed prior to death at the feedlot (9 of the 15 per 10,000 cattle received).
饲养场疾病治疗协会对美国饲养场牛心脏病综合征的可能性
从2017年1月1日到2020年12月31日,来自14个美国饲养场的数据被评估为疾病治疗的最终诊断为心脏病(HD)的概率。研究目的有两个:1)确定牛呼吸道疾病(BRD)治疗次数(0,1,2,3+)与HD之间的关系,2)确定常见饲养场疾病治疗(AIP, BRD,复杂疾病,GI+腹胀,其他)与HD的队列人口统计学的关系。使用广义混合效应模型分析数据以评估晚期HD的概率。感兴趣的共变量包括:BRD治疗、饲养场疾病类别、平均队列到达体重、到达年份、到达季度、饲养场海拔和性别。BRD治疗次数与HD相关(P < 0.01)。需要额外BRD治疗的牛增加了因HD而无法完成饲喂期的可能性。这种相关性的大小受平均队列到达体重、饲养场海拔、性别和到达时间的影响(P < 0.01)。饲养场疾病类别与因HD诊断而无法完成饲养期的概率相关(P < 0.01)。这种关联的程度受平均队列到达体重和饲养场海拔的影响(P < 0.01)。性别受饲养场海拔高度的影响,对因HD诊断而不完成的概率有影响(P < 0.01),海拔越高,HD的概率越大。大多数HD牛在死前在饲养场进行了围栏饲养(每接收的15头牛中有9头)。
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