Estimation of sensitivity and specificity of a novel clinical scoring system for on-farm diagnosis of bovine respiratory disease in pre-weaned dairy calves

Authors

  • W. J. Love Veterinary Medicine Teaching and Research Center, School of Veterinary Medicine, University of California, Davis, Tulare, CA 93274
  • T. W. Lehenbauer Veterinary Medicine Teaching and Research Center, School of Veterinary Medicine, University of California, Davis, Tulare, CA 93274; Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, CA 95616
  • A. L. Van Eenennaam Department of Animal Science, University of California, Davis, CA 95616
  • C. M. Drake Department of Statistics, University of California, Davis, CA 95616
  • P. H. Kass Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, CA 95616
  • T. B. Farver Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, CA 95616
  • S. S. Aly Veterinary Medicine Teaching and Research Center, School of Veterinary Medicine, University of California, Davis, Tulare, CA 93274; Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, CA 95616

DOI:

https://doi.org/10.21423/aabppro20143695

Keywords:

Bovine respiratory disease, BRD, calfhood infection, scoring systems, diagnosis

Abstract

Bovine respiratory disease (BRD) is an important economic disease of cattle in modern production systems. Control of BRD in calves is especially important because calfhood infections lead to reduced weight gain and productivity. Accurate detection of animals affected with BRD remains a significant hurdle for control and treatment. Several clinical scoring systems for BRD diagnosis have been proposed. One scoring system proposed by researchers at the University of Wisconsin-Madison (WI system, McGuirk, 2008) uses 5 clinical signs, each partitioned into 4 levels of severity. A second system (BRD3 system, Love et al, 2014) was developed at the University of California, Davis, to create a system that required less qualitative categorization of clinical signs and reduced calf handling. The BRD3 system used 6 clinical signs each classified as normal or abnormal. The goal of this study was to estimate and compare the diagnostic accuracy of these 2 clinical scoring systems.

Cover image of the 47th Conference Proceedings: An image of a herd of cattle in a field at dusk. Three cows are standing in the foreground, looking adorable. Yellow background.

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Published

2014-09-18

Issue

2014

Section

Research Summaries 1

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