Parasitic myocarditis is caused by

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)