hookworm

hookworm An intestinal parasite that infests a billion people, mainly in tropical and subtropical areas. Infection is from contact with soil contaminated by hookworm larvae. First signs are itching and rash at the site where the larvae penetrate the skin. This is followed by diarrhea, intestinal cramps, pain, anorexia, weight loss, and anemia. Loss of iron and protein due to hookworm can retard the growth and mental development of children, sometimes irreversibly. The infection can be fatal, particularly for infants, pregnant women, and persons who are malnourished. See also Necator americanus.