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  • Title: Sarcocystis arieticanis and other Sarcocystis species in sheep in the United States.
    Author: Dubey JP, Lindsay DS, Speer CA, Fayer R, Livingston CW.
    Journal: J Parasitol; 1988 Dec; 74(6):1033-8. PubMed ID: 3142990.
    Abstract:
    Histological sections of tongues, esophagi, and diaphragms from 512 adult ewes from the northwest United States and Texas were examined for Sarcocystis spp. Sarcocysts were found in sections of 82.1% of 504 tongues, 44.4% of 478 esophagi, and 51.7% of 89 diaphragms. Sarcocystis tenella was the predominant species and was found in 430 (84.0%) sheep; S. arieticanis was found in 18 (3.5%) sheep. The mean number of S. tenella sarcocysts in tissue sections was approximately 10 times higher than that of S. arieticanis. The identification of S. arieticanis was confirmed by ultrastructural studies and by transmission to dogs. Macroscopic sarcocysts of S. gigantea were also found but were not quantitated in all sheep; sarcocysts of S. medusiformis were not observed.
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