Seroprevalence of Neospora caninum Infection in 25 Ontario Dairy Herds and its Association with Periparturient Health and Production

Authors

  • T. F. Duffield Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada Nl G 2Wl
  • A. S. Peregrine Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada Nl G 2Wl
  • B. J. McEwen Animal Health Laboratory, University of Guelph, P.O. Box 3612, Guelph, Ontario, Canada, NIH 6R8
  • s. K. Hietala California Animal Health & Food Safety Laboratory System, CAHFS, University of California, Davis, W Health Sciences Drive, Davis, California, U.S.A. 95616
  • R. Bagg Provel, Division of Eli Lilly Canada Inc, Research Park, Stone Road, Guelph, Ontario, Canada, Nl G 4T2

DOI:

https://doi.org/10.21423/bovine-vol35no1p8-12

Keywords:

animal health, antibodies, dairy herds, disease prevalence, milk production

Abstract

Serum samples were collected in 1995/1996 from 7 58 animals on 25 Ontario Holstein dairy farms at three weeks prior to expected calving. The frozen sera were subsequently analyzed for anti-Neospora caninum antibodies. Herd seroprevalence was 60% and 73% using two different cut-off values for defining infection. Using the lower cut-off, within-herd seroprevalence ranged from Oto 38% with a mean of 9.0% in seropositive herds. Seropositivity was associated with a 3.8-fold increased risk ofretained placenta. No significant impact of infection on milk production was detected for the first three Dairy Herd Improvement test-day evaluations of each cow's lactation.

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Published

2001-01-01

How to Cite

Duffield, T. F., Peregrine, A. S., McEwen, B. J., Hietala, s. K., & Bagg, R. (2001). Seroprevalence of Neospora caninum Infection in 25 Ontario Dairy Herds and its Association with Periparturient Health and Production. The Bovine Practitioner, 35(1), 8–12. https://doi.org/10.21423/bovine-vol35no1p8-12

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