Prevalence of Major Mastitis Pathogens on Ontario Sentinel Dairy Farms

Authors

  • D. Kelton University of Guelph, Guelph, Ontario, Canada
  • A. Godkin Ontario Ministry of Agriculture, Food and Rural Affairs, Ontario, Canada
  • D. Alves 1Ontario Ministry of Agriculture, Food and Rural Affairs, Ontario, Canada
  • K. Lissemore University of Guelph, Guelph, Ontario, Canada
  • K. Leslie University of Guelph, Guelph, Ontario, Canada
  • N. Smart University of Guelph, Guelph, Ontario, Canada
  • C. Church University of Guelph, Guelph, Ontario, Canada
  • P. Meadows University of Guelph, Guelph, Ontario, Canada

DOI:

https://doi.org/10.21423/aabppro19995599

Keywords:

milk samples, management questionnaire, mastitis

Abstract

In May and June 1997, 40 Ontario dairy practitioners and 60 of their dairy-producer clients were recruited to participate in the Sentinel Project. Composite milk samples from all lactating cows in each Sentinel herd were collected and cultured during July and August. A milking and management questionnaire was administered to each participating producer at the time of the initial herd culture. Subsequent herd cultures were carried out every 4 months through December 1998. Composite milk samples from all fresh cows were collected 24 hours after calving. Clinical mastitis cases were recorded and quarter samples were collected and stored. The fresh-cow and clinical-case samples were stored frozen and periodically cultured.

Cover image of the 33rd Conference Proceedings: Herd of Holstein cattle grazing in a field. Large barn and silos in background. Yellow background.

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Published

1999-09-23

Issue

1999

Section

Posters

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