1. Institute for Parasitology and Tropical Veterinary MedicineFreie Universität Berlin Berlin Germany
2. Department of Veterinary Tropical DiseasesFaculty of Veterinary ScienceUniversity of Pretoria Onderstepoort South Africa
3. Department of Animal Medicine Infectious DiseasesFaculty of Veterinary MedicineAssiut University Assiut Egypt
4. Department of Veterinary Microbiology and PathologyWashington State University Pullman WA USA
5. Epidemiology, Parasites and Vectors DivisionAgricultural Research Council ‐ Onderstepoort Veterinary Research Onderstepoort South Africa