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===Introduction===

==Introduction==

''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.

''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.

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===Identification===

==Identification==

The adult worms are dark red. The male has a well developed buccal capsule.  Both the male and the female worms have rounded teeth, which enable them to hold onto the intestinal mucosa.

The adult worms are dark red. The male has a well developed buccal capsule.  Both the male and the female worms have rounded teeth, which enable them to hold onto the intestinal mucosa.

The eggs are 100μu x 50μm.  

The eggs are 100μu x 50μm.  

===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.

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.