1. Unit for Environmental Sciences and Management, North-West University, Potchefstroom 2531, South Africa
2. Department of Livestock Services, Ministry of Agriculture, Food Security, and Nutrition, Private A82, Maseru, Lesotho
3. Animal Production and Health Laboratory, Animal Production and Health Section, Joint FAO/IAEA Division, Department of Nuclear Sciences and Applications, International Atomic Energy Agency, P.O. Box 100, 1400 Vienna, Austria
4. Laboratoire National de l’Elevage et de Recherches Vétérinaires ISRA/LNERV(LNERV), BP 2057, Dakar, Senegal
5. Department of Animal Science, National University of Lesotho, P.O. Roma 180, Lesotho
6. Department of Veterinary Parasitology and Entomology, University of Maiduguri, P. M. B. 1069, Maiduguri 600230, Nigeria
7. Food and Agriculture Organization of the United Nations, Viale delle Terme di Caracalla, 00153 Rome, Italy