title: [Interactions of planorbic vectors of schistosomiasis mansoni and the problem of endemic expansion in the Amazonic region].
abstract: The hypothesis of competitive superiority is discussed in the light, first, of the complexity of the phenomena involved in the interaction and distribution of planorbid populations and, secondly, of the relation that is established between the snails of any given region and the infected human or animal host. Special attention is given to the distribution of planorbids in the Amazon, and the endemic problem of the region is dealt with.
authors.affiliation: Departamento de Biologia do Instituto Oswaldo Cruz da Fundação Instituto Oswaldo Cruz (FIOCRUZ), Rio de Janeiro, Brasil.
authors.forename: R
authors.initials: R
authors.lastname: Valadão
authors.forename: R
authors.initials: R
authors.lastname: Milward-de-Andrade
mesh_terms: D000818:Animals; D001700:Biomphalaria / Q000502:physiology*; D001938:Brazil / Q000453:epidemiology; D004199:Disease Vectors; D004463:Ecology; D006790:Host-Parasite Interactions; D006801:Humans; D012555:Schistosomiasis mansoni / Q000453:epidemiology*; D012959:Socioeconomic Factors
vernacular_title: Interações de planorbídeos vetores da esquistossomose mansoni e o problema da expansão de endemia na região amazônica.