Susceptibility of Biomphalaria straminea from Peixe Angical dam, Tocantins, Brazil to infection with three strains of Schistosoma mansoni

Fernandez, Mônica Ammon; Thiengo, Silvana Carvalho

doi:10.1590/s0074-02762010000400023

Cited by 12 publications

(10 citation statements)

References 10 publications

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“…Neither the specimens that survived for 60 days after exposure without shedding cercariae nor any of the dead snails showed larval stages of S. mansoni in their tissues. The low rates of B. straminea experimentally infected agree with those in previous studies (11) . However, the presence of B. straminea in the breeding sites of the five study sites, susceptibility of specimens to experimental S. mansoni infection, and infected schoolchildren combined with poor home sanitary conditions indicate active schistosomiasis transmission in at least three of the five sites (Terra Nova, Jucurutu, and São Gonçalo/Sousa), even before water transposition.…”

supporting

confidence: 92%

Assessment of schistosomiasis in the semi-arid Northeast region of Brazil: the São Francisco River large-scale water transposition project

Favre

Fernandez

Beck

et al. 2016

Rev. Soc. Bras. Med. Trop.

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Introduction: Risk of schistosomiasis expansion to semi-arid northeastern Brazil under the influence of the Integration Project of the São Francisco River (IPSFR) was assessed. Methods: Stool examinations of schoolchildren, epidemiological investigation, and survey of the local host snail Biomphalaria straminea were performed in five IPSFR municipalities. Results: Six of 4,770 examined schoolchildren were egg-positive for Schistosoma mansoni. Biomphalaria straminea was widespread, but not naturally infected with S. mansoni. Snails experimentally exposed to two laboratory S. mansoni strains yielded infection indices of 1-4.5%. Conclusions: There is evidence of active schistosomiasis transmission in the area; thus, intensive surveillance actions are required.

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supporting

confidence: 92%

Assessment of schistosomiasis in the semi-arid Northeast region of Brazil: the São Francisco River large-scale water transposition project

Favre

Fernandez

Beck

et al. 2016

Rev. Soc. Bras. Med. Trop.

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“…schistosomiasis to non-endemic areas in Brazil via the introduction of vector snails was reported by Fernandez and Thiengo [10][11] , who observed different degrees of susceptibility to Schistosoma mansoni Sambon, 1907 in an experimental infection of B. straminea from three different reservoirs in the Upper Tocantins river basin. Three species of Biomphalaria that play a role in the transmission of S. mansoni in Brazil were recently found in the Pampulha reservoir, which is a potential urban focus of schistosomiasis located in the municipality of Belo Horizonte, State of Minas Gerais 12 .…”

Section: Methodsmentioning

confidence: 82%

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

Fernandez

Mattos

Silva

et al. 2014

Rev. Soc. Bras. Med. Trop.

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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.

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“…It is an important intermediate host for S. mansoni transmission in South America especially Brazil (Paraense and Corrêa, 1989;Melo et al, 2006;Fernandez and Thiengo, 2010). Reports of natural infection of this snail species with S. mansoni were recorded from different parts of Brazil (Malek, 1985;Fernandez and Thiengo, 2010;Galvão et al, 2010;Barboza et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Predicting the spatial distribution of Biomphalaria straminea, a potential intermediate host for Schistosoma mansoni, in China

Habib

Guo

et al. 2016

Geospat Health

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Schistosomiasis is one of the most prevalent parasitic diseases impacting human health in the tropics and sub-tropics. The geographic distribution of Schistosoma mansoni, the most widespread species, includes areas in Africa, the Middle East, South America and the Caribbean. Snails of the genus Biomphalaria act as intermediate host for S. mansoni. Biomphalaria straminea is not indigenous in China but was accidentally introduced to Hong Kong from South America and has spread to other habitats in the southern parts of the country. This species is known for its great dispersal capacity that highlights the importance of the snail as a potential host for S. mansoni in China. In this connection, although no such infection has been recorded in the field so far, the continuous expansion of China's projects in endemic areas of Africa and import of the infection via returning workers or visitors deserve attention. The purpose of this study was to map and predict the spatial distribution of B. straminea in China. Snail occurrence data were assembled and investigated using MaxEnt software, along with climatic and environmental variables to produce a predictive risk map. Of the environmental variables tested, the precipitation of warmest quarter was the most contribution factor for snail's spatial distribution. Risk areas were found in southeastern China and it is expected that they will guide policies and control programmes to potential areas area of snail abundance and used for spatial targeting of control interventions for this invasive species.

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Susceptibility of Biomphalaria straminea from Peixe Angical dam, Tocantins, Brazil to infection with three strains of Schistosoma mansoni

Abstract: 6%, 8.49% and 19% with BH, CM and CMO strains, respectively, (iii)

Cited by 12 publications

References 10 publications

Assessment of schistosomiasis in the semi-arid Northeast region of Brazil: the São Francisco River large-scale water transposition project

Assessment of schistosomiasis in the semi-arid Northeast region of Brazil: the São Francisco River large-scale water transposition project

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

Predicting the spatial distribution of Biomphalaria straminea, a potential intermediate host for Schistosoma mansoni, in China

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