American trypanosomiasis (Chagas' disease)

DDx

Acute stage: malaria, rheumatic fever, African trypanosomiasis
Myocarditis due to other causes, e.g., coxsackie, Rocky Mountain spotted fever, toxoplasmosis, drugs
Arrhythmia or congestive heart failure due to other causes, e.g., sick-sinus syndrome, coronary artery disease
Toxic megacolon due to inflammatory bowel disease or Clostridium difficile-associated colitis
Idiopathic achalasia

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