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==Introduction==

==Introduction==

''Strongylus vulgaris'' is a clinically important parasite causing [[Verminous Endarteritis|verminous arteritis]] and was a very common cause of [[:Category:Colic in Horses|colic in horses]]. Its prevalence has been on the decrease since the use of wormers containing ivermectin.

''Strongylus vulgaris'' is a clinically important parasite of the family [[:Category:Strongyloidea|''Strongyloidea'']]. It causes [[Verminous Endarteritis|verminous arteritis]] and was a very common cause of [[:Category:Colic in Horses|colic in horses]]. Its prevalence has been on the decrease since the use of wormers containing ivermectin.  

===Scientific Classification===

==Hosts==

 

Horses and donkeys.

| '''S. vulgaris'''

==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 100μm 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.

They then transform into L2, and subsequently L3 without leaving the parasite envelope.  L3 are ingested by the host when feeding on pasture.  L3 enter the small intestine, where they shed their envelope, and then begin migration across the muscosal surface, where they transform into L4.

They then transform into L2, and subsequently L3 without leaving the parasite envelope.  L3 are ingested by the host when feeding on pasture.  L3 enter the small intestine, where they shed their envelope, and then begin migration across the mucosal surface, where they transform into L4.

L4 reach the arterioles of the intestine.  Around 2 weeks after the eggs were first ingested they reach the colic and caecal arteries, and then finally the cranial mesenteric artery.

L4 reach the arterioles of the intestine.  Around 2 weeks after the eggs were first ingested they reach the colic and caecal arteries, and then finally the cranial mesenteric artery.

The prepatent period for ''S. vulgaris'' is 6-7 months.

The prepatent period for ''S. vulgaris'' is 6-7 months.

[[Category:Strongyloidea]]

[[Category:Strongyloidea]]

 

[[Category:To_Do_-_Review]]

[[Category:Expert_Review]]