1. Canadian Cooperative Wildlife Health Centre and Centre Québécois sur la Santé des Animaux Sauvages; University of Montreal; Saint-Hyacinthe Quebec Canada J2S 7C6
2. Ministère de l'agriculture, des pêheries et de l'alimentation du Québec; Institut Armand Frappier; Montréal Quebec Canada H7N 4Z3
3. Animal Diseases Research Institute; Lethbridge AL Canada T1J 3Z4
4. US Department of Agriculture; PO Box 848 Greenport NY 11944 USA
5. Institut Maurice Lamontagne; Fisheries and Oceans Canada; Mont-Joli Quebec Canada G5H 3Z4