TY - JOUR T1 - Protective antibodies in Trypanosoma cruzi infections: detection, functional activity and possible mechanisms of trypomastigote killing in vivo and in vitro JO - Memórias do Instituto Oswaldo Cruz A1 - Krettli, Antoniana Ursine SN - 0074-0276 UL - 10.1590/S0074-02761984000500013 VL - 79 Y1 - 1984 PB - Brasil ER -