1 Dipartimento di Scienze di Sanità Pubblica, Sezione di Parassitologia, University of Rome-La Sapienza, Rome, Italy, 2 Department of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, United Kingdom, 3 Centre Medical Saint Camille, Ouagadougou, Burkina Faso, 4 Kenya Medical Research Institute, Wellcome Trust Programme, Centre for Geographic Medicine Resea...