1. Epidemiology, Vectors and Parasites, Agricultural Research Council‐Onderstepoort Veterinary Research Pretoria South Africa
2. Department of Veterinary Tropical Diseases University of Pretoria Pretoria South Africa
3. Department of Zoology and Entomology University of the Free State Bloemfontein South Africa
4. Department of Research Operations, Clinvet International (Pty) Ltd. Bloemfontein South Africa
5. Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture Insect Pest Control Laboratory Vienna Austria