| strongylus | A genus of intestinal parasitic nematodes occurring in animals and man. (12 Dec 1998) |
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| Strongylus radiatus | Species that occurs in cattle and domestic and wild sheep, but rarely in the horse; although worldwide in distribution, it is most common in the northern U.S. And Canada. Synonym: Strongylus radiatus, Strongylus ventricosus. (05 Mar 2000) |
| Strongylus ventricosus | Species that occurs in cattle and domestic and wild sheep, but rarely in the horse; although worldwide in distribution, it is most common in the northern U.S. And Canada. Synonym: Strongylus radiatus, Strongylus ventricosus. (05 Mar 2000) |
| Strongylus vulgaris | A bloodsucking species found chiefly in the caecum of horses and other equids; in the course of their migration, larvae commonly lodge in the wall of the posterior aorta, causing wall damage and the development of verminous aneurysms in this vessel, especially in the anterior mesenteric arteries. (05 Mar 2000) |