Preliminary studies investigating the occurrence of Biomphalaria cousini in Brazil

Caldeira, Roberta Lima; Teodoro, Tatiana Maria; Gomes, Maria Flávia Belfort; Carvalho, Omar dos Santos

doi:10.1590/s0074-02762010000400022

Cited by 7 publications

(6 citation statements)

References 4 publications

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“…Another three species (i.e. B. amazonica, B. peregrina and B. cousini) have been considered as potential intermediate hosts (Corrêa and Paraense, 1971;Paraense and Corrêa, 1973;Caldeira et al, 2010.…”

Section: Introductionmentioning

confidence: 99%

Spatial distribution of Biomphalaria spp., the intermediate host snails of Schistosoma mansoni, in Brazil

et al. 2012

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Schistosomiasis mansoni remains an important parasitic disease of man, endemic in large parts of sub-Saharan Africa, the Middle East, South America and the Caribbean. The aetiological agent is the trematode Schistosoma mansoni, whereas aquatic snails of the genus Biomphalaria act as intermediate hosts in the parasite life cycle. In Brazil, the distribution of Biomphalaria spp. is closely associated with the occurrence of schistosomiasis. The purpose of this study was to map and predict the spatial distribution of the intermediate host snails of S. mansoni across Brazil. We assembled snail "presenceonly" data and used a maximum entropy approach, along with climatic and environmental variables to produce predictive risk maps. We identified a series of risk factors that govern the distribution of Biomphalaria snails. We find that high-risk areas for B. glabrata are concentrated in the regions of Northeast and Southeast and the northern part of the South region. B. straminea are found in the Northeast and Southeast regions, and B. tenagophila are concentrated in the Southeast and South regions. Our findings confirm that the presence of the intermediate host snails is correlated with the occurrence of schistosomiasis mansoni. The generated risk maps of intermediate host snails might assist the national control programme for spatial targeting of control interventions and to ultimately move towards schistosomiasis elimination in Brazil.

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Section: Introductionmentioning

confidence: 99%

Spatial distribution of Biomphalaria spp., the intermediate host snails of Schistosoma mansoni, in Brazil

et al. 2012

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“…Fig. 3a shows the estimated Ip for all 4,842 localities in Minas Gerais using the estimated regression equation (4). Figure 3b shows the plot of the residuals, resulting from the difference between observed and estimated Ip from 1,590 locations.…”

Section: Resultsmentioning

confidence: 99%

“…Among these, there are three Biomphalaria species (B. glabrata, B. tenagophila and B. straminea) that have been found to be naturally infected with S. mansoni. Other three species, B. amazonica, B. peregrina and B. cousini, were experimentally infected, being considered as potential hosts of this trematode [2][3][4]. B. glabrata is of great importance, due to its extensive geographic distribution, high infection indices and efficiency in the schistosomiasis transmission.…”

Section: Introductionmentioning

confidence: 99%

Multiple Regression for the Schistosomiasis Positivity Index Estimates in the Minas Gerais State - Brazil at Small Communities and Cities Levels

Guimarães¹,

Freitas²,

Dutra³

et al. 2013

Parasitic Diseases - Schistosomiasis

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“…Among these, only the first three are naturally found infected with S. mansoni. Another three species, B. amazonica, B. peregrina and B. cousini, were experimentally infected, being considered as potential hosts of this trematode (Corrêa & Paraense, 1971;Paraense & Correa, 1973;Caldeira et al, 2010). Seven species have been reported as having a presence in Minas Gerais state.…”

Section: Molluscs Of the Biomphalaria Genusmentioning

confidence: 99%

A Study of Schistosomiasis Prevalence and Risk of Snail Presence Spatial Distributions Using Geo-Statistical Tools

Guimarães¹,

Fonseca²,

Dutra³

et al. 2012

Schistosomiasis

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Preliminary studies investigating the occurrence of Biomphalaria cousini in Brazil

Abstract: Specific genetic profiles of Brazilian

Cited by 7 publications

References 4 publications

Spatial distribution of Biomphalaria spp., the intermediate host snails of Schistosoma mansoni, in Brazil

Spatial distribution of Biomphalaria spp., the intermediate host snails of Schistosoma mansoni, in Brazil

Multiple Regression for the Schistosomiasis Positivity Index Estimates in the Minas Gerais State - Brazil at Small Communities and Cities Levels

A Study of Schistosomiasis Prevalence and Risk of Snail Presence Spatial Distributions Using Geo-Statistical Tools

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