| necator | A genus of intestinal parasite worms which includes one of the most important hookworms of man, necator americanus. The only other known species, n. Suillus, has been recovered from pigs. (12 Dec 1998) |
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| necator americanus | A common parasite of humans in the moist tropics and subtropics. These organisms attach to villi in the small intestine and suck blood causing diarrhoea, anorexia, and anaemia. (12 Dec 1998) |
| necatoriasis | Infection of humans or animals with hookworms of the genus necator. The resulting anaemia from this condition is less severe than that from ancylostomiasis. (12 Dec 1998) |