Neospora caninum and Milk Production

a Theory Based on a Cornparison of the Effect in Two Populations of Ontario Dairy Herds

Authors

  • T. Duffield Department of Population Medicine, University of Guelph, Guelph, Ontario, Canada
  • J. Hobson Department of Population Medicine, University of Guelph, Guelph, Ontario, Canada
  • D. Kelton Department of Population Medicine, University of Guelph, Guelph, Ontario, Canada
  • A. Peregrine Department of Pathobiology, University of Guelph, Guelph, Ontario, Canada
  • B. McEwen Animal Health Laboratory, University of Guelph, Guelph, Ontario, Canada
  • S. Hietala California Animal Health & Food Safety Laboratory System, University of California, Davis, CA
  • K. Lissemore Department of Population Medicine, University of Guelph, Guelph, Ontario, Canada
  • K. Leslie Department of Population Medicine, University of Guelph, Guelph, Ontario, Canada
  • G. Cramer Department of Population Medicine, University of Guelph, Guelph, Ontario, Canada

DOI:

https://doi.org/10.21423/aabppro20015249

Keywords:

Neospora caninum, milk production, serology, serostatus, conflicting results

Abstract

Recent research on Neospora caninum infection in dairy cattle and its effect on milk production has yielded conflicting results, ranging from positive to negative effects. These differences may be related to experimental factors such as study design, sample selection criteria, statistical techniques, or an as-yet undetermined biological effect. While analysing N. caninum serology and milk production data from two distinct samples of Ontario Holstein dairy cows, a different production effect was identified in each sample. The objective of the work reported here was to compare this effect and propose a potential theory explaining the effect of N. caninum serostatus on milk production in these two populations of Ontario cows.

Cover image of the 34th Conference Proceedings: Four men on horseback lead a single cow through a pen. Yellow background.

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Published

2001-09-13

Issue

2001

Section

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