Strongylus vulgaris - pathogenesis

The image shows an arteriographic picture of the mesenteric arterial system of a foal 60 days after oral infection with 50 third stage larvae of Strongylus vulgaris adn treatmetn at 30 dasy with a larvicidal dose of an anthelmintic.
This arteriograph shows that significant healing has occurred in this foal and it is clear that the larvicidal treatment at 30 days after infection was successful in killing   most if not all migrating fourth stage larvae and allowed the natural healing process to take place. The cranial mesenteric artery is reduced in size and thrombotic occlusions have resolved. All major branches from the cranial mesenteric artery contain contrast material and are therefore now open. The fan of grey lines extending from the ileo-ceco-colic artery (icc) are jejunal and iliac arteries supplying blood to the small intestine. Although there is irregularity in the walls of some arteries, it is clear that the lesions caused by migrating S. vulgaris larvae are well on the way to complete resolution and healing.
a =  abdominal aorta
cm = cranial mesenteric artery
icc = ileo-ceco-colic artery
dc = dorsal colic artery
vc = ventral colic artery
m = medial cecal artery
l = lateral cecal artery
c - celiac artery
g = gastric artery
h = hepatic artery
s = splenic artery
pm = posterior mesenteric artery

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