What is the vector which spread schistosomiasis?

The vector that spreads schistosomiasis is freshwater snails, primarily those belonging to the genus Biomphalaria, Bulinus, and Oncomelania. These snails serve as intermediate hosts for the parasitic flatworms of the genus Schistosoma, which release larvae known as cercariae into the water. When humans come into contact with contaminated water, the cercariae penetrate the skin and can lead to infection. This disease is prevalent in tropical and subtropical regions, often linked to poor sanitation and water management.