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Parasite profile. Hookworms are dangerous parasites that live in a dog's small intestine. With remarkable efficiency, hookworms graze on the lining of the intestine, leaving multiple bloody holes in their wake. These can lead to anemia and may even cause a small puppy to bleed to death.
Epidemiology & Risk Factors. Hookworm is a soil-transmitted helminth (STH) and is one of the most common roundworm of humans. Infection is caused by the nematode parasites Necator americanus and Ancylostoma duodenale. Hookworm infections often occur in areas where human feces are used as fertilizer or where defecation onto soil happens.