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It may interfere with digestion by obstructing the passage of alimentary matter, and irritating the intestine. The S. equinum and S. tetracanthum are small worms. Both sclerostomes attach themselves to the lining membrane of the intestine by their mouth parts, and suck blood. The young S. equinum may live in tumor-like cysts that they cause to form in the lining membrane of the intestine.
Species Organ Ascaris megalocephala Intestines Sclerostoma equinum Large intestine and blood-vessels Sclerostoma tetracanthum Large intestine Oxyrus curvula Large intestine Oxyrus mastigodes Large intestine
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