| Besnoitia bennetti | A species occurring in horses and asses in North America and Africa, and causing a chronic disease with scabbing, scarring, and thickening of the skin. (05 Mar 2000) |
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| Besnoitia | A genus of protozoan parasites (family Besnoitiidae, class Sporozoea), closely related to Toxoplasma, that localise in subcutaneous, connective, serous, and other tissues and are surrounded by a heavy, nucleated wall of host tissue, forming a cyst; hosts include domestic ruminants, reindeer, caribou, rodents, opossums, and reptiles. (05 Mar 2000) |
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| Besnoitia besnoiti | A species causing besnoitiasis of cattle, goats, and larger antelopes in Europe, Africa, the Middle East, South America, and Asia; it primarily causes a chronic low-grade infection; mechanical transmission is by bloodsucking tabanid horseflies. (05 Mar 2000) |
| Besnoitia tarandi | A species occurring in reindeer and caribou, giving rise to a condition called "cornmeal disease" because of the granular nature of the lesions on the skin. (05 Mar 2000) |