Hookworm disease is caused by a parasite that infects the
intestines. Hookworms are usually found only in the tropics.
Hookworms enter the body by burrowing through the skin of the feet
or by being eaten. Once in the body, hookworms attach to the intestinal wall
and suck blood, which, in severe cases, leads to anemia.
A hookworm infestation is treated with medication to kill the
worms. Treatment for anemia is sometimes also needed.