a intestinal parasitic infection caused by larval hookworms that penetrate the host's skin; heavy infection with hookworm can create serious health problems for newborns, children, and persons who are undernourished; hookworm infections occur mostly in tropical and subtropical climates and are estimated to infect about 1 billion people -- about one-fifth of the world's population.
Any of numerous small parasitic nematode worms of the family Ancylostomatidae, having hooked mouthparts with which they fasten themselves to the intestinal walls of various hosts, including humans, causing ancylostomiasis. Also called uncinaria.
The hookworm is a parasitic worm (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. Necator americanus predominates in the Americas, Sub-Saharan Africa, Southeast Asia, China and Indonesia, while A. duodenale predominates in the Middle East, North Africa, India and (formerly) in southern Europe.