Freshwater Snails
Freshwater snails are mollusks who live in a shell within which they can retract completely for protection. These snails are commonly found in lakes, springs, and rivers. While they seem harmless enough, freshwater snails are known carriers of different forms of human and animal parasites. One of the most common diseases caused by freshwater snails is schistosomiasis, a parasitic infection which causes a variety of symptoms, depending on where the infection occurs. The disease may cause irreversible effects such as infertility and may also lead to death if left untreated.