Susceptibility of Biomphalaria tenagophila and Biomphalaria straminea to Schistosoma mansoni infection detected by low stringency polymerase chain reaction

Jannotti-Passos, Liana K.; Souza, Cecília Pereira de

doi:10.1590/s0036-46652000000500010

Cited by 9 publications

(4 citation statements)

References 11 publications

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“…The understanding of the genetic basis for schistosome resistance/or susceptibility in these snail species is especially important, because schistosome eradication programs may benefit from the knowledge of the genetic polymorphism of these snails since association between hosts and parasite tend to generate and maintain genetic polymorphism (May, 1985), as has been predicted in models of schistosome-snail interactions (Morand et al, 1996). Several molecular biology techniques for studies of genetic variability in schistosomiasis vectors have been used Spatz et al, 1999;Knight et al, 1991Knight et al, , 2000Jannotti-Passos and Souza, 2000;Vidigal et al, 2000Vidigal et al, , 2001Caldeira et al, 2000Caldeira et al, , 2001Souza and Passos, 2001;Tuan and Bortolato, 2001). …”

Section: Introductionmentioning

confidence: 99%

Schistosome/mollusk: genetic compatibility

Oliveira¹,

Silva²,

Zanotti-Magalhães³

et al. 2008

Genet. Mol. Res.

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AbSTRAcT. Schistosomiasis remains one of the most prevalent parasitic infections and has significant economic and public health consequences in many developing countries. Economic development and improvement in standard of living in these countries are dependent on the elimination of this odious disease. For the control of Schistosomiasis, understanding the host/parasite association is important, since the host parasite relationship is often complex and since questions remain concerning the susceptibility of snails to infection by respective trematodes and their specificity and suitability as hosts for continued parasite development. Thus, the long term aim of this research is to learn more about the genetic basis of the snail/parasite relationship with the hope of finding novel ways to disrupt the transmission of this disease. In the current research, genetic variability among susceptible and resistant strains within and between Biomphalaria glabrata and B. tenagophila was investigated using RAPD-PCR. The results indicate great genetic variations within the two snail species using three different primers 519 ©FUNPEC-RP www.funpecrp.com.br Genetics and Molecular Research 7 (2): 518-526 (2008) Schistosome/mollusk: genetic compatibility (intrapopulational variations), while specimens from the same snail species showed few individual differences between the susceptible and resistant strains (interpopulational variation).

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Section: Introductionmentioning

confidence: 99%

Schistosome/mollusk: genetic compatibility

Oliveira¹,

Silva²,

Zanotti-Magalhães³

et al. 2008

Genet. Mol. Res.

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“…Studies under semi-natural and field conditions have revealed the competitive superiority of B. straminea over B. glabrata 3,4,5,6,8,9 . Among the factors involved, in addition to low susceptibility to infection by S. mansoni and greater resistance to desiccation, better dispersal capacity and higher vagility were noted for the former species 6,7,14,27 . However, the few existing studies comparing the reproducibility of these two species invariably attribute a higher fecundity rate to B. glabrata 1,2,15,19 .…”

Section: Introductionmentioning

confidence: 99%

Comparative study of the fecundity and fertility of Biomphalaria glabrata (Say, 1818) and Biomphalaria straminea (Dunker, 1848) in a laboratory through self-fertilization and cross-fertilization

Costa

Grault

Confalonieri

2004

Rev. Inst. Med. trop. S. Paulo

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The aim of this study was to compare the fecundity and fertility of B. glabrata and B. straminea by cross- and self-fertilization. To attain this objective, laboratory-raised strains of B. glabrata and B. straminea were used. The former originated from natural breeding grounds in the municipality Paulista, state of Pernambuco, Brazil. The latter originated from irrigation ditches in the municipality of Petrolândia, in the same state. Snail populations of B. glabrata and B. straminea were maintained for 240 days in laboratory. Their fecundity was evaluated by noting the number of egg-masses, eggs and eggs per mass. Their fertility was evaluated by the number of viable eggs and the hatching rate. B. straminea was markedly more fecund than B. glabrata through cross- and self-fertilization, namely: greater egg-mass; higher egg production and more eggs per mass. Regarding fertility, there seemed to be no preferential period for occlusion to occur or a trend in the rhythm of producing viable eggs.

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“…Later, Souza et al 32 reported two specimens that were naturally infected by the parasite but did not provide an infection rate. Data from experimental infection of B. tenagophila originating from the Pampulha reservoir with different strains of S. mansoni revealed infection rates ranging between 4 and 68% [32][33][34][35] ; however, the sampling conducted during the present study revealed that this planorbid species was not verifi ed to be infected with this parasite.…”

Section: A B C D E Fmentioning

confidence: 73%

The Pampulha reservoir remains a potential urban focus of schistosomiasis mansoni in Brazil: changes in the occurrence patterns of Biomphalaria species and a new record of the parasite

Pinto

Mati

Melo

2013

Rev. Soc. Bras. Med. Trop.

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Introduction:The Pampulha reservoir has long been a focus of schistosomiasis transmission in Belo Horizonte, State of Minas Gerais, Brazil. The last malacological study conducted in this urban reservoir was more than two decades ago, and thus, an update on the distribution of the species of Biomphalaria as well as new data on the presence of Schistosoma mansoni in this water body are required. Methods: The current distribution of Biomphalaria spp. in the Pampulha reservoir and their infection with S. mansoni was evaluated during 55 malacological surveys conducted between 2009 and 2012. Results: Biomphalaria straminea displayed a high population density and distribution, and 13.7% (2,233/16,235) of the specimens collected were infected with larval trematodes other than Schistosoma mansoni. Biomphalaria tenagophila and Biomphalaria glabrata, species currently presenting a restricted distribution and small populations, displayed trematode infection rates of 15.2% (98/644) and 13% (83/640), respectively. Thirteen (2%) specimens of B. glabrata were found to be infected with S. mansoni. In addition, a historical review based on previous and new data on the occurrence patterns of Biomphalaria species in this reservoir is presented. Conclusions: The results indicate that the Pampulha reservoir remains a potential focus of urban schistosomiasis in Brazil, and signifi cant changes in the occurrence patterns of Biomphalaria species were verifi ed.

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Susceptibility of Biomphalaria tenagophila and Biomphalaria straminea to Schistosoma mansoni infection detected by low stringency polymerase chain reaction

Cited by 9 publications

References 11 publications

Schistosome/mollusk: genetic compatibility

Schistosome/mollusk: genetic compatibility

Comparative study of the fecundity and fertility of Biomphalaria glabrata (Say, 1818) and Biomphalaria straminea (Dunker, 1848) in a laboratory through self-fertilization and cross-fertilization

The Pampulha reservoir remains a potential urban focus of schistosomiasis mansoni in Brazil: changes in the occurrence patterns of Biomphalaria species and a new record of the parasite

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