Association of hematologic variables and castration status at the time of arrival at a research facility with the risk of bovine respiratory disease in beef calves

• DOI: 10.2460/javma.243.7.1035
• Publication Date: 2013-09-19T22:24:06Z
• Authors: John T. Richeson; Pablo J. Pinedo; Elizabeth B. Kegley; Jeremy G. Powell; M. Shane Gadberry; Paul A. Beck; Shollie M. Falken...
• Keywords: Bovine Respiratory Disease; Association (psychology)

To determine the association of CBC variables and castration status at time arrival a research facility with risk development bovine respiratory disease (BRD).Retrospective cohort study.1,179 crossbred beef bull (n = 588) steer (591) calves included in 4 experiments 2 University Arkansas facilities.Calves underwent processing treatments accordance experiment which they were enrolled. Castration values determined facilities. Calves monitored to detect signs BRD during 42-day period.The areas under receiving operator characteristic curves for significant contrast test results ranged from 0.51 (neutrophil count) 0.67 (eosinophil count), indicating limited predictors calves. The only that had associations as via multivariable logistic regression analysis eosinophil RBC counts. odds bulls 3.32 times steers.Results this study indicated low high counts blood samples may be useful identification BRD. Further warranted validate these prediction higher BRD, versus steers time.