Regions Infections are widely distributed in tropical and subtropical areas, with the greatest numbers occurring in sub-Saharan Africa, the Americas, China and east Asia. Infection estimates The World Health Organization estimates that globally more than 1.5 billion people (24% of the total population) have a<unk><unk>  helminth infection. Over 270 million preschool-age children and over 600 million school-age children live in areas where these parasites are intensively<unk> , and are in need of treatment and preventive interventions. Latest estimates indicate that more than 880 million children are in need of treatment from<unk>  infections. By type of parasitic worm the breakdown is: * approximately 807–1,121 million with ascaris * approximately 576–740 million with hookworm * approximately 604–795 million with whipworm Deaths Latest estimates indicate that the total annual death toll which is directly attributable is as high as 135,000. The death toll due to the malnutrition link is likely to be much higher.
Soil-transmitted helminthiasis
Helminthiasis
Behavior-altering parasite
Pinworm infection
Tick infestation
Trichiasis
Acariasis
Toxocariasis