Difference between revisions of "Strongylus vulgaris"
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| − | ''Strongylus vulgaris'' is a parasite of horses. | + | ''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== | ||
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*Well developed buccal capsule in male | *Well developed buccal capsule in male | ||
| − | ==Life cycle== | + | ===Life cycle=== |
| − | + | 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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| − | + | 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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==Pathogenesis== | ==Pathogenesis== | ||
Revision as of 08:00, 14 July 2010
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This article is still under construction. |
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
- Dark red
- Well developed buccal capsule in male
Life cycle
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.
They then transform into L2, and subsequently L3 without leaving the parasite envelope. L3 are ingested by the host when feeding on pasture.
Pathogenesis
By larvae:
- Disruption to endothelium of blood vessel
- May cause arterial thromboembolism in the horse.
- May cause intestinal infarcts, see General Pathology
By adults:
- Accidental damage to blood vessels as a result of feeding on intestinal mucosa