Schistosomiasis, commonly known as snail fever, bilharzia and bilharziasis, is a disease caused by parasitic worms. It is the mostly deadly NTD – neglected tropical disease – affecting millions of people each year around the world. Even with a low mortality rate, schistosomiasis is only second to malaria in terms of having a great social, economic, and health impact in tropical regions of the world, and also as the most common parasitic disease among humans.
Schistosomiasis is caused by a pathogen, which is basically a disease-producing agent. The term ‘pathogen’ is generally used to directly refer to infectious organisms; for example, a virus, a bacterium, or fungi. There are several ways where pathogens can enter a human body; mainly by air respiration, water contact or ingestion, soil contact and animal contact or bite. Diseases, illnesses characterized by a patient’s symptoms and physical findings, are sometimes confused with pathogens and the difference