The hookworm is a parasitic nematode that lives in the small intestine of its host, which may be a mammal such as a dog, cat, or human. Two species of hookworms commonly infect humans, Ancylostoma duodenale and Necator americanus.
The live cycle of hookworm in human began when the (1) hookworm larvae enter the body through the skin or mouth and pass into the bloodstream. (2) The larvae travel through the bloodstream to the lungs. (3) Secretions from the lungs, which contain the larvae, are coughed up and swallowed, passing into the stomach. (4) The larvae pass into the intestine, where they mature into adult worms. The head of the adult hookworm has sharp, curved dental plates that enable it to cling to the intestine. (5) Eggs produced by female worms leave the body in the stool. The eggs hatch into larvae in the soil.
Hookworm is a public health problem in Africa, Asia, and South America. These hookworms mainly affect human.
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