“…The high genetic variability of T. cruzi has been confirmed by different approaches, and this species was classified in different sub-groups, as zymodemes 6,7,9 , major groups or lineages 10,11 , and thereafter in six discrete typing units (DTUs) 12 , which correspond to the six clusters of isozyme genotypes found by Tibayrenc and Ayala 13 . According to consensus among specialists, the main T. cruzi genetic types were correlated to those six DTUs, and they were renamed Trypanosoma cruzi I-VI (TcI-TcVI) 7,14,15 .…”