The Whipworm as a Blood Sucker

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Abstract
Numerous Trichuris vulpis engorged with reddish or pinkish fluid have been found at necropsies of dogs. These worms, when cut, gave strong positive reactions to the benzidine test. Of hundreds of hookworms and whipworms, washed and cut, nearly all were positive with this test. Longitudinal and transverse sections of the slender anterior end of whipworms, when stained with the dilute trichrome stain, gave unmistakable evidence of having blood cells in the esophageal lumen; and a detailed study of the anterior end of the worms indicated the means whereby whipworms can penetrate blood vessels and suck blood. Though less voracious than hookworms, whipworms are, nonetheless, avid blood suckers.