The chemotherapy available for the treatment of Leishmaniosis and Chagas is restricted to a few medicines. Moreover, snake venoms have been studied because they have active substances with therapeutic potential. Thus, the aim of this study was to evaluate the in vitro effects of total venom of Crotalusdurissuscascavella , Crotalusdurissusterrificus and Bothropsjararaca in Leishmania chagasi and Trypanosoma cruz...