Impact of Treatment of Beef Cows with Ivermectin on Herd Productivity

Authors

  • P. T. Guichon Feedlot Health Management Services, Okotoks, AB., Canada, T0L 1T0
  • G. K. Jim Feedlot Health Management Services, Okotoks, AB., Canada, T0L 1T0
  • J. A. Jacobsen MERCK AGVET, Calgary, AB., Canada, TlY 5Y9
  • W. G. Ryan MERCK AGVET, Woodbridge, NJ
  • S. W. Bauck MERCK AGVET, Pointe Claire-Dorval, QC, Canada, H9R 4P8
  • C. A. Piché MERCK AGVET, Pointe Claire-Dorval, QC, Canada, H9R 4P8

DOI:

https://doi.org/10.21423/aabppro19926409

Keywords:

productivity impact, ivermectin, reproductive performance, parasite control

Abstract

Internal parasite control in commercial beef cow-calf operations in western Canada has, until recently, not been considered an important part of herd management. Recent epidemiological studies conducted in the region indicate however, that the cow is an important source of pasture contamination and hence infection for the calf (1). Studies conducted in North Dakota have demonstrated improved productivity and economic returns associated with treatment of the cow herd with ivermectin (2,3). Similar studies have not been published for western Canada.
The objective of this study was to evaluate the productivity impact of a fall treatment with ivermectin of commercial beef cows. The effect of treatment was evaluated by monitoring the body condition and reproductive performance of cows and by measuring calf weight gains.

Cover image of the First Volume of the 25th Conference Proceedings: An earl-morning photo of farmland. A small farm is nestled among rolling hills, fields stretching across a curving road that disappears between dark green trees. The barn is a cheery red color with a tin roof. Beneath the photo is the a statement of the conference's theme in white italics: Challenges of the Bovine Industry in the Twenty-First Century. Deep red background.

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Published

1992-08-31

Issue

1992: Volume 1

Section

Helminthology and Anthelmintics

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