Protozoa of the genus Trypanosoma are haemotropic agents widely reported in cattle from Latin America. In this region, Trypanosoma evansi, Trypanosoma theileri and T. vivax are the identified species (Desquesnes, 2004). Of these, T. vivax is the most pathogenic, causing anaemia, fever, weight loss, reproductive problems in males and females, and low production (Gonzatti