Please use this identifier to cite or link to this item:
https://www.arca.fiocruz.br/handle/icict/10637
Type
ArticleCopyright
Open access
Collections
- IOC - Artigos de Periódicos [12596]
Metadata
Show full item record
FRESHWATER GASTROPODS OF THE BAIXADA MARANHENSE MICROREGION, AN ENDEMIC AREA FOR SCHISTOSOMIASIS IN THE STATE OF MARANHÃO, BRAZIL: I - QUALITATIVE STUDY
Schistosoma mansoni
Vectors
Baixada Maranhense Microregion
Cercaria
Brazil
Author
Affilliation
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Malacologia. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Malacologia. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Malacologia. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Malacologia. Rio de Janeiro, RJ, Brasil.
Universidade Estadual do Maranhão. Centro de Educação Ciências Exatas e Naturais. Departamento de Química e Biologia. São Luis, MA, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Malacologia. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Malacologia. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Malacologia. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Malacologia. Rio de Janeiro, RJ, Brasil.
Universidade Estadual do Maranhão. Centro de Educação Ciências Exatas e Naturais. Departamento de Química e Biologia. São Luis, MA, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Malacologia. Rio de Janeiro, RJ, Brasil.
Abstract
The Baixada Maranhense Microregion currently has the highest prevalence of schistosomiasis in the State of
Maranhão, likely because this parasitosis is characterized as an occupational disease, and increased contact with water increases
the risk of infection by Schistosoma mansoni. This paper reports the results of the fi rst comprehensive freshwater malacological
survey performed in the Baixada Maranhense Microregion. Methods: Freshwater mollusks were collected from the twenty-one
municipalities of the Baixada Maranhense Microregion and from Bacurituba and Cajapió and were evaluated for infection by
trematodes. Results: A total of 9,129 mollusks were collected (sixteen species), which included the fi rst records of six species in
the State of Maranhão: Gundlachia radiata, G. ticaga, Hebetancylus moricandi, Plesiophysa guadeloupensis, Pomacea bridgesii
diffusa and Omalonyx sp. Biomphalaria glabrata was found in fi ve municipalities, whereas B. straminea was found in nine.
Biomphalaria glabrata and B. straminea were observed in syntopy in Pinheiro and São Bento. Of the 990 specimens of B.
glabrata and the 2,109 specimens of B. straminea that were exposed to and/or analyzed for the presence of larval trematodes,
only a single specimen of B. glabrata (0.1%) from São Bento shed S. mansoni . Other larval trematodes were fi rst observed in
mollusks from the State of Maranhão. Conclusions: These results indicate that the study area is epidemiologically important due
to the presence of two natural vectors of schistosomi.
Keywords
Freshwater snailsSchistosoma mansoni
Vectors
Baixada Maranhense Microregion
Cercaria
Brazil
Share