Chagas disease, also known as American trypanosomiasis, is an infectious disease caused by the protist Trypanosoma cruzi
The infectologist is a medical specialist and diseases caused by infectious agents such as bacteria, viruses, fungi and parasites.
A cardiologist is a doctor who specializes in the diagnosis and treatment of diseases of the heart and blood vessels: the cardiovascular system.
The gastroenterologist is a doctor specializing in diseases of the digestive system including esophagus, stomach, intestines, colon and rectum, pancreas, gallbladder, bile ducts and liver.
Remember that for the proper selection of health professional that treats chagas disease you must consider the nature, severity and symptoms you are presenting.