Transmission electron microscopic (TEM) image reveals some of the ultrastructural histopathology found in this cardiac tissue sample in a case of cardiac toxoplasmosis. The biopsy specimen was harvested from a patient with a fatal case of AIDS. You're looking at a close view of what is referred to as a pseudocyst, situated inside a myocardial myocyte, which contained numerous Toxoplasma gondii bradyzoites, some undergoing the asexual developmental process known as endodyogeny. Magnification: unknown.