The work was supported by Fundac¸a˜o para a Cieˆncia e Tecnologia (FCT) of the Portuguese Ministry of Science (PTDC/SAU-GMG/100313/2008), the Federal German Ministry of education and Science (Biofuture) C.S.S.G-S. was supported by an FCT fellowship (SFRH/BD/15888/2005). M.A.I. was funded by the EU FP 7 Marie Curie Initial Training Network ‘‘Intervention Strategies against Malaria (InterMalTraining)’’, contract no. 215281. L.F.M. is a Young Investigator from the Human Frontier Science Program and receives support from Fundac¸a˜o Luso-Americana para o Desenvolvimento and Fundac¸a˜o para a Cieˆncia e a Tecnologia (PTDC/SAU-MII/69280/2006 and PTDC/SAU-MII/78333/2006). F.F. thanks the Chica and Heinz Schaller Foundation for support. M.M.M. and F.F. are members of the EU FP7 Network of Excellence EVIMalaR