Qualification and Quantification of Bacterial Pathogen Load in Acute Bovine Respiratory Disease Cases

Authors

  • C. Roof Department of Clinical Sciences, Kansas State University, Manhattan, KS 66506
  • M. Apley Department of Clinical Sciences, Kansas State University, Manhattan, KS 66506
  • D. S. McVey Nebraska Veterinary Diagnostic Center, University of Nebraska, Lincoln, NE 68588
  • D. G. McClary Elanco Animal Health, Auburn, AL 36830

DOI:

https://doi.org/10.21423/aabppro20104139

Keywords:

bacteria, pathogen isolates, pathogen load, respiratory tract, lung tissue, histology scores, calves

Abstract

In December 2009 a total 194 steers, bulls, and heifers weighing 400-700 lb (180-320 kg) were purchased at an Arkansas sale barn on a Friday and shipped 12 hours to a northern Kansas feedlot on Saturday. There was no previous history of treatment. The objectives of the study were to evaluate (1) bacterial pathogen isolates in different locations in the respiratory tract, (2) pathogen load in lung tissue as it corresponds to histology scores, and (3) total pathogen load in clinically ill and clinically normal calves.

Cover image of the 43rd Conference Proceedings: Two short-horned cattle grazing in a field, surrounded by a flock of egrets. Yellow background.

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Published

2010-08-19

Issue

2010

Section

Research Summaries 3

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