1. Ain Shams Research and Training Center on Vectors of Diseases, Ain Shams University, Abassia, Cairo, Egypt,
2. Kuvin Centre for the Study of Infectious and Tropical Diseases, Hebrew University-Hadassah Medical School, Jerusalem, Israel,
3. and
Department of Biochemistry and Epidemiology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20205