[1] CNRS, URA 1961, Unite Immuniphiopathol Infect, LEA14C, F-75724 Paris 15, France
[2] Univ Paris 06, F-75724 Paris, France
[3] Inst Pasteur, Unite Genet Mammiferes, F-75724 Paris 15, France
[4] CHU Pitie Salpetriere, INSERM, U511, Unite Immunobiol Cellulaire & Mol Infect Parasita, F-75643 Paris 13, France
[5] Gulbenkian Inst Sci, P-2780156 Oeiras, Portugal