Comparison of thoracic ultrasonography with analysis of bronchoalveolar lavage fluid for the diagnosis of subclinical bronchopneumonia in dairy calves

Authors

  • T. L. Ollivett Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada N1G 2W1
  • D. F. Kelton Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada N1G 2W1
  • D. V. Nydam College of Veterinary Medicine, Cornell University, Ithaca, NY 14853
  • J. Caswell Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada N1G 2W1
  • J. Hewson Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada N1G 2W1
  • T. F. Duffield Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada N1G 2W1
  • Ken Leslie Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada N1G 2W1

DOI:

https://doi.org/10.21423/aabppro20133811

Keywords:

bronchopneumonia, neutrophilic exudate, neutrophils, Pulmonary ultrasonography, lung tissue

Abstract

The pathophysiology of bronchopneumonia (BP) is such that peripheral airways fill with neutrophilic exudate, which results in pulmonary consolidation and atelectasis. This exudate increases the proportion of neutrophils in bronchoalveolar lavage fluid (BALF), with proportions ranging from 10% to 20% suggestive of BP. Pulmonary ultrasonography (US), which differentiates between aerated and nonaerated lung tissue, has good sensitivity (Se = 85%) and specificity (Sp = 98%) for detection of BP in clinically ill calves and might be useful for diagnosis of subclinical BP. The purpose of this study was to compare thoracic US with BALF as a means to diagnose subclinical BP in dairy calves, with gross postmortem examination used as the gold standard.

Cover image of the 46th Conference Proceedings: An image of cattle standing in a field during th day. They are looking rather indignantly at the camera. Yellow background.

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Published

2013-09-19

Issue

2013

Section

Research Summaries 1

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