Figure 1. . A) Sarcocysts isolated from persons infected with Sarcocystis nesbetti, Pangkor Island, Malaysia, 2012. Intact human sarcocyst (length 190 µm) with thin cyst wall (arrow) from homogenized temporalis tissue inoculated into a U937 monocytic cell culture (original magnification ×200, scale bar = 20 µm). B) Intramuscular sarcocyst enclosed by a thin smooth cyst wall (arrow) without any protrusions. Maximum cyst wall thickness is ≈0.5 µm (hematoxylin and eosin stained, original magnification ×40, scale bar = 10 µm).