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Strongylus vulgaris (view source)

Revision as of 08:00, 14 July 2010

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''Strongylus vulgaris'' is a parasite of horses.

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''Strongylus vulgaris'' is a clinically important parasite causing verminous arteritis and was a very common cause of colic in horses. Its prevalence has been on the decrease since the use of wormers containing ivermectin.

==Appearance==

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*Well developed buccal capsule in male

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==Life cycle==

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===Life cycle===

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*Eggs shed in faeces ~~onto pasture~~

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The ''S. vulgaris'' eggs are shed in the faeces. Under optimal conditions of high humidity and temperatures over 10 degrees, the eggs will transform into rhabditiform L1 larvae within a few days.

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*Develop into L3 larvae

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*Ingested by horse

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They then transform into L2, and subsequently L3 without leaving the parasite envelope. L3 are ingested by the host when feeding on pasture.

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*Penetrate intestine mucosa

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*Moult in 7 days ~~to L4 in sub-mucosa~~

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*L4 migrate to cranial mesenteric artery

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*Develop over months

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*Moult to L5

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*Migrate to caecum and ~~colon~~

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*Form nodules around the ~~larvae~~

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*Nodules rupture into the ~~lumen of the intestine~~

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*Adults live in the caecum and colon

==Pathogenesis==

Cmcory

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