Disease vectors Mollusca

skin vesicles created penetration of schistosoma. (source: cdc)

schistosomiasis (also known bilharzia, bilharziosis or snail fever), disease caused fluke worm schistosoma, second malaria devastating parasitic disease in tropical countries. estimated 200 million people in 74 countries infected disease – 100 million in africa alone. parasite has 13 known species, 2 of infect humans. parasite not mollusc, species have freshwater snails intermediate hosts.