1. Department of Veterinary Tropical Diseases University of Pretoria Pretoria South Africa
2. Department of Zoology and Entomology Mammal Research Institute University of Pretoria Pretoria South Africa
3. Department of Production Animal Studies University of Pretoria Pretoria South Africa
4. CIRAD UMR Animal Santé, Territoires, Risque et Ecosystèmes (ASTRE) Montpellier France
5. ASTRE Univ. Montpellier CIRAD INRA Montpellier France
6. Regional Office for Europe and Central Asia Food and Agriculture Organization of the United Nations Budapest Hungary