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Large Strongyles (view source)

Revision as of 22:01, 26 April 2010

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*''S. vulgaris'':

**Potentially highly pathogenic

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**Damage to cranial mesenteric artery → endarteritis → thrombosis and possibly embolism → colic

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**Damage to cranial mesenteric artery → [[Verminous Endarteritis|endarteritis]] → thrombosis and possibly embolism → colic

*Other ''Strongylus'' species :

**Relatively non-pathogenic

**Migration of ''S. edentatus'' and ''S. equinus'' confined to roomy tissues (e.g. mesentery, liver)

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~~==== Verminous endarteritis ====~~

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[[Category:Horse Nematodes]]

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*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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