1 Department of Clinical Sciences, Faculty of Veterinary Medicine, University of Liege, Quartier Vallee 2, Avenue de Cureghem 3, 4000, Liege, Belgium. emiliepm@hotmail.com.
2 Department of Clinical Sciences, Faculty of Veterinary Medicine, University of Liege, Quartier Vallee 2, Avenue de Cureghem 3, 4000, Liege, Belgium.
3 Department of Food Sciences - Microbiology, Faculty of Veterinary Medicine, University of Liege, Quartier Vallee 2, Avenue de Cureghem 3, 4000, Liege, Belgium.