Efficacy of a DNA immunostimulant for on-arrival control of bovine respiratory disease in fall-placed feedlot calves

Authors

  • Joyce Van Donkersgoed Alberta Beef Health Solutions Inc., Box 307, Picture Butte, Alberta, TOK 1V0, Canada
  • Steve Hendrick 205063 Twp Rd 100, Lethbridge County, Alberta, T1J 5P3, Canada
  • Tamara Hofstede Bayer Animal Health, Bayer Inc., 2920 Matheson Blvd. East, Mississauga, ON, L4W 5R6, Canada

DOI:

https://doi.org/10.21423/bovine-vol52no2p141-145

Keywords:

bovine respiratory disease, BRD, feedlot, Zelnate

Abstract

A randomized complete block design trial was conducted in a commercial finishing feedlot in southern Alberta, Canada using auction-market origin fall-placed steer calves (n = 5430; initial body weight 618 ± 22 lb; 280.9 ± 10.0 kg) to evaluate the comparative efficacy of on-arrival treatment with a DNA immunostimulant and tulathromycin versus tulathromycin alone for prevention of bovine respiratory disease (BRD). The addition of the DNA immunostimulant reduced first-pull treatment rates for BRD (P=0.02), case fatality rate for BRD (P=0.08), mortality rate for BRD (P=0.03), mortality rate for BRD and histophilosis (P=0.09), average daily gain (P<0.01) with dead weights included, and increased dry matter conversion (P<0.01) with dead weights included.

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Published

2018-06-01

How to Cite

Van Donkersgoed, J., Hendrick, S., & Hofstede, T. (2018). Efficacy of a DNA immunostimulant for on-arrival control of bovine respiratory disease in fall-placed feedlot calves. The Bovine Practitioner, 52(2), 141–145. https://doi.org/10.21423/bovine-vol52no2p141-145

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