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Resumo ARTIGO Abstract A malacological survey to detect foci of transmission of schistosomiasis and other parasitic diseases was undertaken into water-courses from 13 municipalities of microregion of Belo Horizonte, MG, Brazil. From 1990to 1996 were found infected by trematodes: Biomphalaria glabrata (7,920), infected by Schistosoma mansoni (1.9%), Echinostomatidae (1.2%), Strigeidae (0.6%), C e r c a ria minense (0.1%) and Dero g e n i d a e ( -0.1%); B. s t ra m i n e a (4,093) infected by Strigeidae (0.6%), Echinostomatidae (0.2%), B. tenagophila (1,338), infected by Strigeidae (0.1%) and P hysa marm o ra t a

Published and unpublished observations on geographical distribution of

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