In sarcocystosis, the endothelium and muscles and other soft tissues are invaded by Apicomplexan protozoans of the genus Sarcocystis. As the name implies, Sarcocystis spp (from Greek sarkos: muscle and kystis: cysts) form cysts in muscles of various intermediate hostsn humans, horses, cattle, sheep, goats, pigs, birds, rodents, camelids, wildlife, and reptiles. The cysts vary in size from a few micrometers to several centimeters, depending on the host and species. Most of Sarcocystis spp infections are distributed worldwide.

Fil: Moré, Gastón Andrés. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Veterinarias. Cátedra de Parasitología y Enfermedades Parasitarias; Argentina