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| *''S. vulgaris'': | | *''S. vulgaris'': |
| **Potentially highly pathogenic | | **Potentially highly pathogenic |
− | **Damage to cranial mesenteric artery → endarteritis → thrombosis and possibly embolism → colic | + | **Damage to cranial mesenteric artery → [[Verminous Endarteritis|endarteritis]] → thrombosis and possibly embolism → colic |
| *Other ''Strongylus'' species : | | *Other ''Strongylus'' species : |
| **Relatively non-pathogenic | | **Relatively non-pathogenic |
| **Migration of ''S. edentatus'' and ''S. equinus'' confined to roomy tissues (e.g. mesentery, liver) | | **Migration of ''S. edentatus'' and ''S. equinus'' confined to roomy tissues (e.g. mesentery, liver) |
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− | ==== Verminous endarteritis ====
| + | [[Category:Horse Nematodes]] |
− | *Caused by larvae of ''S. vulgaris'' within the cranial mesenteric artery
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− | *Also called "verminous aneurism" (misnomer as aneurism = dilatation/thinning of blood vessel wall; also, aneurisms are rare)
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− | *Wall of artery grossly thickened (organising thrombi, inflammatory responses)
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− | *Can be detected on rectal palpation
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− | *Many cases asymptomatic
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− | *May get embolism → infarction of areas of intestinal wall → colic or chronic ulceration (note: generally good collateral circulation; therefore colic is not inevitable)
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− | *Aberrant larvae may cause thrombosis in other arteries; e.g. iliac, cerebral, coronary
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− | *Avermectin/milbemycins or fenbendazole are used to control migrating ''S. vulgaris'' larvae[[Category:Horse Nematodes]]
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