Summary
Electron microscope studies of the cyst wall of a murine Sarcocystis-like organism of Mus musculus indicate that the sarcocyst wall is a degenerate muscle cell. The degenerate muscle cell contains nuclei, mitochondria, ribosomes, and myofibrils in disarray with the Z-bands thickened. Surrounding the outside of the muscle cell there is a layer of fibrous material, and occasional fibroblasts are seen. The parasites are found within a parasitophorous vacuole in the muscle cell. There are short finger-like projections extending into the vacuole from the muscle cell. The ground substance of the vacuole is fairly homogeneous, but somewhat more electron dense between the finger-like projections.
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Viles, J.M., Powell, E.C. The ultrastructure of the cyst wall of a murine Sarcocystis . Z. F. Parasitenkunde 49, 127–132 (1976). https://doi.org/10.1007/BF00382419
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DOI: https://doi.org/10.1007/BF00382419