This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: parasitology, Subject name: Microbiology
[{'content': 'Chagas disease is caused by \nSelect and explain. \nA. Trypanosoma cruzi, B. Leishmania Donovani, C. Giardia Lamblia, D. Toxoplasma gondii', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Trypanosoma cruzi causes Chagas diseaseThey are introduced when infected kissing bug feces are rubbed into conjunctiva, bite site or a break in the skin.Unilateral swelling of the eyelids (Romana&;s sign) is characteristic.Interstitial myocarditis is the most common serious condition.Invasion or toxic destruction of nerve plexuses in the alimentary tract wall leads to megaesophagus and megacolon (Brazilian Chagas disease)Jawetz 27e pg: 715', 'role': 'assistant'}]