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A MALACOLOGICAL SURVEY IN THE MANSO POWER PLANT, STATE OF MATO GROSSO, BRAZIL: NEW RECORDS OF FRESHWATER SNAILS, INCLUDING TRANSMITTERS OF SCHISTOSOMIASIS AND EXOTIC SPECIES
Reservoir
Schistosoma mansoni
Exotic species of freshwater mollusk
Asiatic mollusks
Mato Grosso
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.
Universidade do Estado do Rio de Janeiro. Instituto de Biologia Roberto Alcantara Gomes. 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 do Estado do Rio de Janeiro. Instituto de Biologia Roberto Alcantara Gomes. Laboratório de Malacologia. Rio de Janeiro, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de Malacologia. Rio de Janeiro, RJ, Brasil.
Abstract
Introduction: Schistosomiasis is a parasitic disease of public health concern in Brazil, and the construction of hydroelectric
dams, in addition to increasing permanent human settlement and tourism, has created conditions suitable for the establishment of
mollusks that can transmit schistosomiasis. Such areas require a number of actions to prevent the establishment of schistosomiasis.
This paper reports on a freshwater malacological survey carried out in the geographical area of the Manso Power Plant.
Methods: Mollusks were collected in 18 municipalities in the State of Mato Grosso between February 2002 and February
2004 (qualitative study) and from April 2009 to February 2011 (quantitative study). Results: Thirty-one species of mollusks
were collected, including newly recorded species (Antillorbis nordestensis and Burnupia ingae). In addition, the geographic
distributions of known species, including Biomphalaria straminea, a snail vector of Schistosoma mansoni, were expanded.
A total of 4,507 specimens were collected in the APM Manso reservoir (Usina Hidrelétrica de Aproveitamento Múltiplo de
Manso) during the quantitative study, and Biomphalaria amazonica was found in six of the 10 localities analyzed. The Afroasiatic
species Melanoides tuberculata, introduced after February 2009, was the dominant species (relative abundance 94.96%).
Conclusions: The study area is epidemiologically important due to the occurrence of B. straminea and B. amazonica, which are
vectors of schistosomiasis, and M. tuberculata, a snail host of Centrocestus formosanus, which is responsible for centrocestiasis
transmission. Observations of M. tuberculata and the exotic freshwater clams Corbicula fluminea and Corbicula largillierti raise
concerns about biodiversity.
Keywords
DistributionReservoir
Schistosoma mansoni
Exotic species of freshwater mollusk
Asiatic mollusks
Mato Grosso
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