I-Schistosomiasis ichaphazele abantu abaphantse babe zizigidi ezingama-210 ehlabathini jikelele ukusukela ngo-2012. Kuqikeleleka ukuba ngabantu abali-12,000 ukuya kuma-200,000 ababulawa yiyo kunyaka ngamnye. isifo sifunyanwa ngokuqheleke kakhulu eAfrika, kwanaseAsiya nakuMzantsi Melika. Ngabantu abazizigidi ezingama-700 million, kumazwe angaphezulu kwangama-70, abahlala kwimimandla apho esi sifo sixhaphake khona. Kumazwe etropiki, i-schistosomiasis iyeyesibini kwimalariya phakathi kwezifo zezifunxi-gazi ezinefuthe elikhulu kwezoqoqosho. I-Schistosomiasis idweliswe njengesifo setropiki esingahoywanga.