Chistosomiasis is a ailment this is because of parasites (genus Schistosoma) that enter human beings through attaching to the pores and skin, penetrating it, after which migrating through the venous gadget to the portal veins in which the parasites produce eggs and in the end, the signs and symptoms of acute or persistent disease (as an example, fever, belly soreness, blood in stools). Health officials don't forget the disorder to be a bug contamination, or helminthiasis. Bilharziasis, bilharzia, bilharziosis, and snail fever or, in the intense shape, Katayama fever are trade names for schistosomiasis. The disease is determined particularly in growing nations in Africa, Asia, South America, the Middle East, and the Caribbean and is considered one in all many tropical diseases that can be soil-transmitted (or water-transmitted). In the U.S., it's miles recognized in vacationers who have visited those growing countries and in traffic from those countries, or from lab accidents. More than two hundred,000 people die every year in Sub-Saharan Africa from this contamination. The form of snail this is part of the parasite's life cycle (see beneath) is not endemic (non-endemic) to U.S. Freshwater sources within the U.S.