A randomized controlled clinical trial to evaluate the effect of an intranasal respiratory vaccine on calf health, ultrasonographic lung consolidation, and growth in Holstein dairy calves

Authors

  • T. L. Ollivett Dept of Pop Med, Ontario Veterinary College, University of Guelph, Guelph, ON, N1G 2W1 Canada
  • K. E. Leslie Dept of Pop Med, Ontario Veterinary College, University of Guelph, Guelph, ON, N1G 2W1 Canada
  • T. Duffield Dept of Pop Med, Ontario Veterinary College, University of Guelph, Guelph, ON, N1G 2W1 Canada
  • D. V. Nydam Dept of Pop Med and Diagnostic Sciences, Cornell University, College of Veterinary Medicine, Ithaca, NY 14853
  • J. Hewson Dept of Clinical Studies, Ontario Veterinary College, University of Guelph, Guelph, ON, N1G 2W1 Canada
  • J. Caswell Dept of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON, N1G 2W1 Canada
  • D. F. Kelton Dept of Pop Med, Ontario Veterinary College, University of Guelph, Guelph, ON, N1G 2W1 Canada

DOI:

https://doi.org/10.21423/aabppro20143692

Keywords:

passive transfer, antibodies, BRD, bovine respiratory disease, administered vaccines, lung lesions, thoracic ultrasonography, intranasal vaccine

Abstract

Although passive transfer of antibodies to the newborn calf provides many great benefits, high levels of maternal antibodies may limit the ability of the calf to respond to parenterally administered vaccines against the respiratory viruses associated with bovine respiratory disease (BRD). Experimental challenge studies have demonstrated varying levels of efficacy of vaccines administered via the intranasal route. Unfortunately, direct identification of lung lesions associated with BRD requires euthanasia and often limits the size of study populations. As an alternative, thoracic ultrasonography (US) can be performed quickly and provides an accurate antemortem assessment of lung health. Therefore, the purpose of this randomized controlled clinical trial was to evaluate the effect of an intranasal vaccine on calf health, ultrasonographic lung lesions, and growth in young Holstein calves.

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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