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This work aimed to evaluate changes due to parasitism by Strongylus vulgaris in the aorta, cranial mesenteric and ileocecocolic artery by B-mode ultrasound. It was observed many arterial lesions and the ileocecocolic artery presented the major ultrasound changes. In the 26 animals examined, 18 had arterial lesions caused by S. Vulgaris, detected on B-mode ultrasound. Only one thrombus was identified in one animal on the abdominal aorta. On unarmed rectal palpation wasn’t showed nodules, thickening or increase in vascular diameter. Ultrasound was more sensitive than palpation in arteritis verminotic diagnosis. The increased diameter of the cranial mesenteric artery accompanied by wall thickening in abnormal ultrasound group (C/A), indicates worm infection arteritis. B-mode ultrasound identified the dilation of ileocecocolic artery (small aneurysms), thickening and mineralization of the arterial wall.