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Test your knowledge of equine parasites with this quiz. If you're stumped, don't fret: The answers, with complete explanations, are provided.
1) B - Incorrect.
These are eggs (embryos) of Anoplocephala perfoliata, a cestode of horses. Migrating larvae of S. vulgaris damage the cranial mesenteric artery, and, historically, this parasite was an important cause of colic in horses. However, this nematode is readily treated by modern anthelmintics and is considered largely absent from managed horses today. 3