Chagas' disease is one of the most important public health problems in
South America and Mexico. Migrations from rural areas into urban zone
s have contributed to the spread of the disease. The main targets of t
he disease within the body are the heart, the alimentary tract, and th
e nervous system. In the acute phase of the disease, the parasite resp
onsible for the disease can be identified in the blood by direct exami
nation. This article identifies the parasite responsible for transmiss
ion of the disease and discusses symptoms, means of identification in
the patient, and treatment.