What type of disease is schistosomiasis classified as?

Schistosomiasis is classified as a water contact disease because it is caused by parasitic worms of the genus Schistosoma, which complete part of their life cycle in freshwater environments. Humans typically become infected with schistosomiasis when they come into contact with contaminated water sources harboring the larvae of these parasites. These larvae penetrate the skin upon contact, leading to infection. This mode of transmission underscores the importance of water sanitation and hygiene in controlling the spread of schistosomiasis. In contrast, the other disease classifications listed do not apply to schistosomiasis, as it is not primarily transmitted through food, milk, or the air.