Author Affiliations +
G. CHALMERS,1 H.L. BRUCE,2 D.L. TOOLE,2 D.A. BARNUM,1 P. BOERLIN1
1Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
2Maple Leaf Foods Agresearch, 473-Sixth Concession Road, R.R.#3, Burford, Ontario, N0E 1A0, Canada