1. Clinic of Farm Animals, Faculty of Veterinary Medicine, Aristotle University, 546 27 Thessaloniki, Greece
2. Laboratory of Parasitology and Parasitic Diseases, Faculty of Veterinary Medicine, Aristotle University, 541 24 Thessaloniki, Greece
3. Department of Pathology and Animal Health, Faculty of Veterinary Medicine, Jordan University of Science and Technology, P.O. Box 3030, Irbid, Jordan
4. National Veterinary Laboratory, 69100 Komotini, Greece
5. Division of Foodborne, Waterborne and Environmental Diseases, Centers for Disease Control and Prevention, Atlanta, GA, USA