1. Veterinary Public Health Section, Department of Paraclinical Sciences, Faculty of Veterinary Science, University of Pretoria , Onderstepoort, South Africa
2. Canadian Research Institute for Food Safety (CRIFS), Department of Food Science, University of Guelph , Guelph, Ontario, Canada
3. Department of Veterinary Medicine, Laboratorio di Ispezione Degli Alimenti di Origine Animale, University of Perugia , Perugia, Italy
4. Department of Veterinary Tropical Diseases, Faculty of Veterinary Science, University of Pretoria , Onderstepoort, South Africa