Substâncias da natureza com atividade anti-Trypanosoma cruzi

Abstract

Chagas' disease, a zoonose caused by Trypanosoma cruzi, affects 16-18 million people in the world. The most important mode of transmission of the disease is associated with the feces of several species of triatomine bugs that are strictly hematophagous. Actually, infected blood transfusion is the major mechanism of transmission in urban areas. Gentian violet is the only available prophylactic drug. Despite its effectiveness, there are some restrictions on its use. The available therapy of Chagas' disease is inadequate since the treatment of patients with the drugs nifurtimox and benznidazole presents serious toxic side effects. The search for new trypanocidal compounds to the treatment of Chagas'disease and to use for eliminating T. cruzi from blood, that are more effective and that do not affect red blood cells is the main goal in the prevention of Chagas' disease. In this review a large set of chemicals of plant origin are enumerated and their trypanocidal activity are briefly discussed.