Fig. 1

Sarcocystis infection in the myocardium of sheep. LM, H&E. Bar = 50 μm. a Thick-walled S. tenella sarcocyst, domestic sheep. b Thin-walled S. arieticanis sarcocyst, domestic sheep. c Numerous sarcocysts in sheep myocardium, domestic sheep. d Inflammatory cells infiltrating the area around a sarcocyst, domestic sheep. e Cysts testing negative for Toxoplasma gondii, domestic sheep. f A sarcocyst in Purkinje fibers, domestic sheep. g Immature sarcocyst with numerous metrocytes, domestic sheep. h Bradyzoites are located in the numerous chambers, created by the septa of the sarcocyst; the finger-like villar protrusions around a cyst wall; myocardium squash, unstained, domestic sheep. i Bradyzoites in pepsin-digestion liquid; unstained, domestic sheep. j Sarcocyst from myocardium squash, unstained, argali