Author | Zanardi, Vanessa Sousa | |
Author | Barbosa, Lúcio Macedo | |
Author | Simões, Fabiano Mosquera | |
Author | Thiengo, Silvana Carvalho | |
Author | Blanton, Ronald Edward | |
Author | Ribeiro Junior, Gilmar | |
Author | Silva, Luciano Kalabric | |
Author | Reis, Mitermayer Galvão dos | |
Access date | 2019-10-31T16:03:54Z | |
Available date | 2019-10-31T16:03:54Z | |
Document date | 2019 | |
Citation | ZANARDI, Vanessa Sousa et al. Prevalence of Infection of Biomphalaria glabrata by Schistosoma mansoni and the risk of urban Schistosomiasis mansoni in Salvador, Bahia, Brazil. Revista da Sociedade Brasileira de Medicina Tropical, v. 52, p. 1-9, 2019. | pt_BR |
ISSN | 0037-8682 | pt_BR |
URI | https://www.arca.fiocruz.br/handle/icict/36783 | |
Sponsorship | Foundation for Research Support of the State of Bahia (FAPESB) - PNX0001/2015, Coordination of Improvement of Higher Level Personnel (CAPES), National Council for Scientific and Technological Development (CNPQ) - 307319/2016-4, National Institutes of Health (NIH) 1R01AI121330. | pt_BR |
Language | eng | pt_BR |
Publisher | Sociedade Brasileira de Medicina Tropical | pt_BR |
Rights | open access | |
Subject in Portuguese | Esquistossomose | pt_BR |
Subject in Portuguese | Biomphalaria glabrata | pt_BR |
Subject in Portuguese | Prevalência | pt_BR |
Subject in Portuguese | Tipos cercarianos | pt_BR |
Title | Prevalence of Infection of Biomphalaria glabrata by Schistosoma mansoni and the risk of urban Schistosomiasis mansoni in Salvador, Bahia, Brazil | pt_BR |
Type | Article | |
DOI | 10.1590/0037-8682-0171-2019 | |
Abstract | Biomphalaria glabrata is considered to be responsible for the incidence of schistosomiasis in Brazil. Therefore, surveillance of areas where schistosomiasis is prevalent is fundamental for public health planning. This study was aimed to evaluate B. glabrata populations in water bodies of the city of Salvador, determine their distribution, estimate the prevalence of Schistosoma mansoni infections, characterize shed cercariae, and identify transmission foci. Methods: Malacological surveys were carried out
in 17 water collections from Salvador. Snail species were identified based on shell and mantle characteristics. Snails were evaluated for S. mansoni infection by exposure to light and via real time polymerase chain reaction (qPCR) using S. mansoni-18S rRNA subunit specific primers. Results: 1,403 B. glabrata were collected. Classical cercarial shedding indicated that 5 snails (0.4%) were positive for S. mansoni. A higher prevalence of infections was found in Horta de Saramandaia (5.5%) and Lagoa do IAT (1.9%). Non-Schistosoma larvae, such as Xiphidiocercaria, Strigeidae, Spirorchiidae and Clinostomidae, were observed in 3.2% of the snails. S. mansoni DNA was detected in 6.2% snails via qPCR. Conclusions: B. glabrata is widely distributed in Salvador, as indicated by 7 water collections associated with a risk of schistosomiasis transmission. To our knowledge, this is the first study to identify B. glabrata eliminating cercariae of Clinostomidae, Strigeidae, and Spirorchiidae in Salvador. We propose that qPCR may be employed in combination with classical cercarial shedding. Estimating S. mansoni prevalence in snails by only considering the results of light exposure method classical into account may underestimate the problem. | pt_BR |
Affilliation | Fundação Oswaldo Cruz. Instituto Gonçalo Moniz. Salvador, BA, Brasil. | pt_BR |
Affilliation | Fundação Oswaldo Cruz. Instituto Gonçalo Moniz. Salvador, BA, Brasil / Escola Bahiana de Medicina e Saúde Pública, Salvador, BA, Brasil. | pt_BR |
Affilliation | Centro de Controle de Zoonoses, Salvador, BA, Brasil. | pt_BR |
Affilliation | Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Rio de Janeiro, RJ, Brasil. | pt_BR |
Affilliation | Case Western Reserve University. Center for Global Health and Diseases. Cleveland, Ohio, USA. | pt_BR |
Affilliation | Fundação Oswaldo Cruz. Instituto Gonçalo Moniz. Salvador, BA, Brasil. | pt_BR |
Affilliation | Fundação Oswaldo Cruz. Instituto Gonçalo Moniz. Salvador, BA, Brasil. | pt_BR |
Affilliation | Fundação Oswaldo Cruz. Instituto Gonçalo Moniz. Salvador, BA, Brasil / Yale University. New Haven, Connecticut, USA / Universidade Federal da Bahia. Salvador, BA, Brasil. | pt_BR |
Subject | Schistosomiasis | pt_BR |
Subject | Biomphalaria glabrata | pt_BR |
Subject | Prevalence | pt_BR |
Subject | Cercarial types | pt_BR |