Affiliation: | 1. Research Group on Infectious Diseases of Swine, Montreal University, Faculty of Veterinary Medicine, Saint-Hyacinthe, Québec, Canada.; 2. Unité de Microbiologie (UR454) INRA Clermont-Ferrand-Theix, St-Genes-Champanelle, France.; 3. INRS-Institut Armand-Frappier, Laval, Québec, Canada.; University Medical Center Utrecht, Netherlands, |