Diagnostic accuracy of clinical illness for bovine respiratory disease diagnosis in feedlot beef calves

a systematic review of the literature and Bayesian meta-analysis

Authors

  • E. Timsit Department of Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB T2N 4Z6, Canada Feedlot Health Management Services, Okotoks, AB TlS 2A2, Canada
  • N. Dendukuri Division of Clinical Epidemiology, McGill University Health Centre, Montreal, QC H4A 3J1, Canada
  • I. Schiller Division of Clinical Epidemiology, McGill University Health Centre, Montreal, QC H4A 3J1, Canada
  • S. Buczinski Department of Clinical Science, Faculté de Médecine Vétérinaire, Université de Montréal, St-Hyacinthe, QC J2S 2M2, Canada

DOI:

https://doi.org/10.21423/aabppro20163499

Abstract

Bovine respiratory disease (BRD) diagnosis in feedlots is based on clinical inspection (CI) done once or twice daily by pen-riders or pen-walkers. A diagnosis of BRD is typically established when an animal has visual signs of BRD and a rectal temperature above a threshold (ranging from 103.1 to 104 °F) (39.5 to 40 °C). This diagnostic approach is known to have less than ideal sensitivity (SeCI) and specificity (SpCI). However, accurate estimates of SeCI and SpCI are not available, in part due to the absence of a reference test for antemortem diagnosis of BRO. The objective was to determine the diagnostic accuracy of CI for BRO diagnosis in post-weaned beef calves. The presence of lung lesions at slaughter (LU) was used as an imperfect reference test to determine SeCI and SpCI.

Cover image of the 49th Conference Proceedings: An image of a herd of Angus cattle grazing in a field at dusk. Yellow background.

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Published

2016-09-15

Issue

2016

Section

Research Summaries 4

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