This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Pathology
[{'content': 'Parasitic myocarditis is caused by \nSelect and explain. \nA. Trichuris trichura, B. Trichinella spirallis, C. Entrobius vermicularis, D. Strongyloides stercoralis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Trichinosis is the most common helminthic disease with associated cardiac involvement. In the United States, viral infections are the most common cause of myocarditis, with coxsackieviruses A and B and other enteroviruses accounting for a majority of the cases. Cytomegalovirus (CMV), human immunodeficiency virus (HIV), influenza virus, and others are less common pathogens. (Robbins Basic Pathology,9th edition,pg no.401,402)', 'role': 'assistant'}]