The Most Common NTDs

Neglected tropical diseases (NTDs) are the most common afflictions of the world's poorest people, affecting more than half a billion children around the world. It costs less than 50 cents per year to treat and protect one person from the most common NTDs.


Lymphatic Filariasis

Lymphatic Filariasis, also known as elephantiasis, affects more than 120 million people in 80 countries worldwide, and is an extremely painful, debilitating and disfiguring disease.
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Onchocerciasis, also known as river blindness, infects 26 million people living near the rivers and fast-moving streams of sub-Saharan Africa.
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Schistosomiasis, also known as bilharzia or “snail fever”, is a parasitic disease carried by fresh water snails. It is the most deadly NTD and affects more than 200 million people worldwide.
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Trachoma is an infectious disease of the eye caused by the bacterium Chlamydia trachomatis, and is the world’s leading cause of preventable blindness. Approximately 41 million people worldwide have active trachoma. View full profile


Soil-Transmitted Helminths


Ascariasis, or roundworm, is an intestinal parasitic infection and is part of a family of parasites known as the soil-transmitted helminths. It affects more than 1 billion people worldwide.
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Hookworm is an intestinal parasite most commonly found in tropical and subtropical climates worldwide, particularly in Africa and Latin America. This soil-transmitted helminth affects an estimated 700 million people. View full profile



Trichuriasis, also in the family of soil-transmitted helminths, is an infection of the large intestine caused by the human whipworm. More than 800 million people are affected.
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Other NTDs

The NTDs mentioned above can be treated and prevented with medicine administered to entire communities at once in mass drug administrations (or MDAs). Other NTDs can be managed through available, low-cost measures. Learn more from the World Health Organization.