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Schistosomiasis »

What is schistosomiasis?

Schistosomiasis is a disease that is caused by parasites (genus Schistosoma) that enter humans by attaching to the skin, penetrating it, and then migrating through the venous system to the portal veins where the parasites produce eggs and eventually, the symptoms of acute or chronic disease (for example, fever, abdominal discomfort, blood in stools). This disease is also known as bilharziasis, bilharzia, bilharziosis, and snail fever or, in the acute form, Katayama fever. Theodore Bilharz identified the parasite Schistosoma hematobium in Egypt in 1851. Schistosomiasis is the second most prevalent tropical disease in the world; malaria is the first. The disease is found mainly in developing countries in Africa, Asia, South America, the Middle East, and the Caribbean. About 207 million people in at least 74 countries are estimated to have the disease. In the U.S., it is diagnosed in tourists who have visited these developing...

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