1. Jomo Kenyatta University of Agriculture and Technology, P.O. Box 62000-00200, Nairobi, Kenya
2. US Army Medical Research Directorate-Kenya, P.O. Box 606-00621, Nairobi, Kenya
3. Kenya Medical Research Institute, Centre for Virus Research, P.O. Box 54628-00200, Nairobi, Kenya
4. International Centre for Insect Physiology and Ecology, P.O. Box 30772-00100, Kenya