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

Data from 14 U.S. feedlots January 1, 2017, through De­cember 31, 2020, were evaluated for disease treatment on the probability of being terminally diagnosed with heart (HD). The study objective was two-fold: 1) determine as­sociation between number bovine respiratory (BRD) treatments (0,1,2,3+) and HD, 2) common feedlot (AIP, BRD, Complex Disease, GI+Bloat, Other), cohort demographics HD. analyzed using generalized mixed-effects models to evaluate terminal Covariates interest include: BRD treatments, category, average arrival weight, year, quarter, elevation sex. associated HD (P < 0.01). Cattle requiring additional increased their not finishing feeding period due magnitude this association influenced by eleva­tion, sex quarter Feedlot catego­ries phase a diagnosis Sex 0.01) higher elevations having greater majority cattle railed prior death at (9 15 per 10,000 received).