Muscular Sarcocystis in a Dog
نویسنده
چکیده
A sarcocyst is described from the biceps femoris muscle of a dog using both light and transmission electron microscopy. The sarcocyst was spherical to ovoid and measured 47 x 52 /um inclusive of the wall. The wall was palely eosinophilic, approximately 2.3 jum at its widest margin, and 0.9 Mm at its narrowest margin. Cyst wall projections were barely visible in histological sections. Ultrastructurally, they appeared as irregularly spaced electron dense projections, measuring up to 1.5 /itm long and 0.9 um wide. The electron dense granular layer of the wall was approximately 0.7 um thick. Interior septa were visible as electron dense lines that appeared to compartmentalize numerous irregularly arranged bradyzoites. Bradyzoites were elongate with discernible apical complexes and with posterior nuclei. Metrocytes were not seen. The sarcocyst did not appear to elicit an inflammatory response and was considered an incidental finding.
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