''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==
==Appearance==
Line 8:
Line 8:
*Well developed buccal capsule in male
*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.