Gonzales, J.C. Sanchez, V.M. Thome, J.W. Goncalves, P.C. Oliveira, C.M.B. Lymnaea columella, hospedeiro intermediario de Fasciola hepatica (Lin. 1758)no Rio Grande do Sul, Brasil [molusco] Subjects--Topical Terms: MOLUSCOFASCIOLAHOSPEDEIRORIO GRANDE DO SUL