Refractivity of Marisa cornuarietis and Other Aquatic Snails in Puerto Rico to Infection with Schistosoma mansoni and Fasciola hepatica

Abstract

Biological control methods for schistosomiasis in man and fascioliasis in cattle include the use of Marisa cornuarietis, a predatory snail. To insure that this snail does not transmit the trematode parasites, laboratory exposures were made under favorable conditions. It was found that Marisa cornuarietis, as well as other potential biological control snails, did not transmit either of the two parasites.