Susceptibility of Biomphalaria amazonica and Biomphalaria occidentalis from Manso Dam, Mato Grosso, Brazil to infection with three strains of Schistosoma mansoni

Fernandez, Mônica Ammon; Thiengo, Silvana Carvalho

doi:10.1590/s0074-02762006000900036

Cited by 11 publications

(12 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…B. straminea is of great epidemiological importance because it is responsible for areas of active transmission of schistosomiasis in northeastern Brazil, and its occurrence in the Cuiabá River (municipality of Cuiabá) is significant because of the frequent presence of fishermen at this site. Experimental infection studies of B. amazonica populations from the APM Manso reservoir (collected from Chapada dos Guimarães) revealed infection rates of 2.02% and 9.09% with the BH and EC strains of S. mansoni, respectively 21 . Although natural infection of B. amazonica with S. mansoni has never been described, since the 1970s experimental infection studies have raised concerns about the transmission of schistosomiasis in the range of B. amazonica 22 .…”

Section: Discussionmentioning

confidence: 99%

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.

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Discussionmentioning

confidence: 99%

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.

Self Cite

View full text Add to dashboard Cite

show abstract

“…However, B. occidentalis was not found to be a good host, either in the above-mentioned studies or in others performed by Fernandez and Thiengo (2006) using B. occidentalis from the state of Mato Grosso. In addition, the observed failure of S. mansoni strains from Belo Horizonte to infect B. occidentalis from Ouro Preto do Oeste does not allow us to conclude that this species cannot transmit the disease in this area, because strains of S. mansoni may adapt to the local strains of B. occidentalis, as Paraense and Correa (1963) observed with B. tenagophila in the Paraíba River valley in the state of São Paulo (Coimbra Jr and Engel 1982).…”

Section: Discussionmentioning

confidence: 82%

“…However, only S. mansoni became established because the existence of intermediate hosts and environmental conditions similar to those found in Africa (Silva 1984). The main intermediate host of this parasite is Biomphalaria glabrata, but other species such as B. tenagophila and B. straminea also act as hosts (Fernandez and Thiengo 2006). Schistosoma mansoni has low mortality, and the major causes of death are related to severe clinical forms of the disease, which are generally characterized by liver cirrhosis, portal hypertension, colitis, pulmonary and neurological forms, which occur decades after the initial infection (Maroja 1953).…”

Section: Introductionmentioning

confidence: 99%

Potential for shistosomiasis in a municipality of Rondônia, Brazilian Amazon

et al. 2016

View full text Add to dashboard Cite

Schistossomiasis is a parasitic disease, caused by helminths of the genus Schistosoma and transmitted in Brazil by snails of the genus Biomphalaria. The municipality of Ouro Preto do Oeste, Rondônia, in the Brazilian Amazon Region, has unusually registered more than 900 cases of schistosomiasis in the last 10 years. The aim of this study was to investigate de potential of transmission of schsitosomiasis in Ouro Preto do Oeste. A total of 1,196 people in a risk area for the disease transmission were requested to answer a clinical-epidemiological survey and to collect feces samples for examination. All the samples that underwent examination resulted negative for S. mansoni. Two hundred and sixty-eight snails were collected in the locality of Ouro Preto do Oeste in 32 different locations. Among these, 44% were classified as belonging to the genus Biomphalaria. Another sample of snails (146 specimens), collected at the same sites, were submitted to an in vitro challenge with Schistosoma mansoni, and none of them were able to transmit the parasite. Finally, we discuss the epidemiological importance of these findings and the lack of attention to a patient with the disease in a non-endemic area. We failed to detected any association between shistossomiasis and the snails from the genus Biomphalaria, that exists in the local, as the planorbids were unable to transmit Shistosoma mansoni. Perhaps the small sample and/or the stool examination technique can have contributed to the results. Further studies, in other localities of Rondônia and with a greater sample could put some light in this question. KEYWORDS: Schistosomiasis; Amazon; Transmission. Potencial de transmissão de esquistossomose em município de Rondônia, Amazônia brasileira RESUMOA esquistossomose é uma doença parasitária, causada por helmintos do gênero Schistosoma e transmitida no Brasil por caramujos do gênero Biomphalaria. O município de Ouro Preto do Oeste, Rondônia, Amazônia brasileira, notificou, de forma não usual, mais de 900 casos de esquistossomose mansônica nos últimos 10 anos. O objetivo deste estudo foi investigar o potencial de transmissão da esquistossomose em Ouro Preto do Oeste. Um total de 1.196 pessoas residindo em áreas de risco para a transmissão da doença foram abordadas para responderem um questionário clínico-epidemiológico e realização de exame parasitológico de fezes. Todas as amostras foram negativas para S. mansoni. Duzentos e sessenta e oito caramujos foram coletados em Ouro Preto do Oeste, de 32 localidades diferentes. Entre estes, 44% foram classificados como pertencendo ao gênero Biomphalaria. Outra amostra de caramujos (146 exemplares), coletada nos mesmos locais, foi submetida in vitro a cepas de Schistosoma mansoni, sendo todos incapazes de transmitirem o parasito. Por fim, discute-se a importância epidemiológica desses achados e a falta de atenção ao paciente portador da parasitose em áreas indenes. O estudo não conseguiu demonstrar a ocorrência de transmissão na localidade e nem a habilidade dos planorbídeos locais...

show abstract

“…The snails were individually exposed to eight miracidia. Based on previous studies on susceptibility performed with B. amazonica (Corrêa & Paraense 1971, Paraense & Corrêa 1985, Fernandez & Thiengo 2006, a pilot project was conducted using the average number of miracidia used in these papers and the best result was found using eight miracidia, with more infected snails and less mortality. Fifty specimens of B. glabrata were exposed to eight miracidia as an infection control.…”

Section: Methodsmentioning

confidence: 99%

“…The third profile showed associations with the two B. cousini and B. amazonica profiles, suggesting the possibility of hybrids between these species . Experiments on susceptibility have shown that B. amazonica and B. cousini are potential hosts of S. mansoni (Corrêa & Paraense 1971, Paraense & Corrêa 1985, Fernandez & Thiengo 2006.…”

mentioning

confidence: 99%

Hybridism between Biomphalaria cousini and Biomphalaria amazonica and its susceptibility to Schistosoma mansoni

Teodoro¹,

Jannotti-Passos

Carvalho³

et al. 2011

Mem. Inst. Oswaldo Cruz

View full text Add to dashboard Cite

Susceptibility of Biomphalaria amazonica and Biomphalaria occidentalis from Manso Dam, Mato Grosso, Brazil to infection with three strains of Schistosoma mansoni

Cited by 11 publications

References 6 publications

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

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

Potential for shistosomiasis in a municipality of Rondônia, Brazilian Amazon

Hybridism between Biomphalaria cousini and Biomphalaria amazonica and its susceptibility to Schistosoma mansoni

Contact Info

Product

Resources

About