IFN-'gama', but not nitric oxide or specific IgG, is essential for the in vivo control of low-virulence Sylvio X10/4 Trypanosoma cruzi parasites - Marinho, Claudio Romero Farias; Nuñez-Apaza, Luis Natividad; Martins-Santos, R.; Bastos, K. R. B.; Bombeiro, A. L.; Bucci, D. Z.; Sardinha, L. R.; Lima, Maria Regina D'Império; Alvarez, José Maria (Scandinavian Journal of Immunology, 2007)