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

Teodoro, Tatiana Maria; Jannotti-Passos, Liana K.; Carvalho, Omar dos Santos; Grijalva, Mario J.; Baus, Esteban G.; Caldeira, Roberta Lima

doi:10.1590/s0074-02762011000700011

Cited by 11 publications

(10 citation statements)

References 19 publications

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“…Moreover, recent molecular investigation of several Biomphalaria populations from Guangdong indicated that most of the species currently harboring water systems are B. kuhniana not B. straminea [ 26 ]. This conclusion merited further careful investigation because B. kuhniana has so far been shown to be refractory to S. mansoni infection [ 27 , 45 ], whereas B. straminea is generally considered to be a susceptible species, albeit in some cases at a low level, that can nonetheless transmit schistosomiasis [ 46 – 50 ], and even sustain natural transmission in some settings [ 13 ]. It is worth noting, however, that the taxonomic confusion within Biomphalaria has led some to speculate that naturally-infected B. straminea found in Venezuela may have in fact been B. kuhniana [ 13 ] .…”

Section: Discussionmentioning

confidence: 99%

Morphological and molecular characterization of invasive Biomphalaria straminea in southern China

Habib

Guo

et al. 2018

Infect Dis Poverty

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BackgroundSchistosomiasis is a common parasitic disease designated as a neglected tropical disease by the World Health Organization. Schistosomiasis mansoni is a form of the disease that is caused by the digenean trematode Schistosoma mansoni, transmitted through Biomphalaria spp. as an intermediate host. Biomphalaria was introduced to Hong Kong, China in aquatic plants shipments coming from Brazil and the snail rapidly established its habitats in southern China. Earlier studies of Biomphalaria spp. introduced to southern China identified the snails as Biomphalaria straminea, one of the susceptible species implicated in S. mansoni transmission in South America. However, recent molecular investigations also indicated the presence of another South American species, B. kuhniana, which is refractory to infection. As such, it is important to identify accurately the species currently distributed in southern China, especially with emerging reports of active S. mansoni infections in Chinese workers returning from Africa.MethodsWe combined morphological and molecular taxonomy tools to precisely identify Biomphalaria spp. distributed in Guangdong Province, southern China. In order to clearly understand the molecular profile of the species, we constructed a phylogeny using mtDNA data (COI and 16S rRNA sequences) from six populations of Biomphalaria spp. from Shenzhen City in Guangdong Province. In addition, we examined the external morphology of the shell and internal anatomy of the reproductive organs.ResultsBoth morphological and molecular evidences indicated a close affinity between Biomphalaria spp. populations from Guangdong and B. straminea from Brazil. The shell morphology was roughly identical in all the populations collected with rounded whorls on one side and subangulated on the other, a smooth periphery, an egg-shaped aperture bowed to one side, and a deep umbilicus. The shape and number of prostate diverticula (ranged from 11.67 to 17.67) in Guangdong populations supports its close affinity to B. straminea rather than B. kuhniana. Molecular analysis did not conflict with morphological analysis. Little genetic differentiation was observed within Biomphalaria populations collected. Phylogenetic analysis of COI and 16S rRNA haplotypes from snails collected and B. straminea sequences from Brazil and China using Bayesian inference revealed that Guangdong populations were clustered in one clade with B. straminea from Hong Kong of China and B. straminea from Brazil indicating their close affinity to each other.ConclusionsData obtained in the current study clearly show that the populations of Biomphalaria spp. investigated are B. straminea, and we assume that those snails were either introduced via passive dispersal from Hong Kong of China or as a result of multiple introduction routes from Brazil.Electronic supplementary materialThe online version of this article (10.1186/s40249-018-0505-5) contains supplementary material, which is available to authorized users.

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Section: Discussionmentioning

confidence: 99%

Morphological and molecular characterization of invasive Biomphalaria straminea in southern China

Habib

Guo

et al. 2018

Infect Dis Poverty

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“…In the Ceara State, this is the only native species involved in S. mansoni transmission. However, the PISF will result in changes in this ecosystem balance and biodiversity: possibility of introducing new species (e.g., B. glabrata - the most competent vector of schistosomiasis); increase (e.g., entry of a larger number of B. straminea ), decrease or even extinction of other species; changes in the genetic diversity of native communities, mainly by hybridization 23 . Both cited species are present in several parts of the Sao Francisco River Basin 24 .…”

Section: Discussionmentioning

confidence: 99%

Identification of Biomphalaria sp. and other freshwater snails in the large-scale water transposition project in the Northeast of Brazil

Bezerra

Pinheiro

Filho

et al. 2018

Rev. Inst. Med. trop. S. Paulo

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The wide eco-bio-social intervention generated by the SaoFrancisco River Integration Project (PISF) may contribute to the dispersion or introduction of schistosomiasis intermediate hosts in areas without prior recording. The objective was to characterize the limnic malacofauna and its distribution along watersheds involved in the PISF. A cross-sectional study based on the collection of mollusks from 33 water bodies, from Aurora, Brejo Santo, Jaguaretama, Jaguaribara, Jati e Mauriti municipalities in the Ceara (CE) State was developed. The conchological characteristics were used to identify snails at the genus level. The snails of the genus Biomphalaria were analyzed for the presence of Schistosoma mansoni cercariae and the molecular identification (only mollusks from Brejo Santo-CE) for differentiation between species. The following species were found: Biomphalaria sp.; Drepanotrema sp.; Melanoides sp.; Physa sp.; and Pomacea sp. Pomacea sp. (75.8%) and Biomphalaria sp. (72.7%) were the most prevalent species. All municipalities showed Biomphalaria sp. Biomphalaria straminea (Porcos Stream) and Biomphalaria kuhniana was identified in the Boi 1 and Cipo reservoirs (Brejo Santo). The evaluated municipalities under the influence of the PISF present areas with potential for schistosomiasis transmission. It is necessary to intensify control actions and health surveillance in these areas.

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“…The authors found that an increase in susceptibility was more easily obtained than an increase in resistance (Zuim et al, 2005). Even in the case of hybrid mollusks (crosses between susceptible and resistant species or populations), complete resistance to schistosome infections has never been achieved (Rosa et al, 2005;Teodoro et al, 2011). Evidence of genetic polymorphism has been reported, including comparisons of the genetic variability of mollusks that are susceptible and refractory to parasitism (Abdel-Hamid et al, 1999;Spada et al, 2002;Silva et al, 2004).…”

Section: Discussionmentioning

confidence: 99%

“…This highlights the importance of the heredity of susceptibility among snails and the maintenance of foci of the disease. Other studies have reported that a similar population of snails may respond differently when exposed to different strains of S. mansoni, and that some of these strains exhibit pre-adapted phenotypes that can affect the degree of parasitism, thereby enabling the potential expansion of the schistosomiasis to new locations, where snail populations are found (Teodoro et al, 2011;Simões et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

Host-parasite relationship between Biomphalaria amazonica (Paraense, 1966) and Schistosoma mansoni (Sambon, 1907)

et al. 2016

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Biomphalaria amazonica is a planorbid species considered a potential host of Schistosoma mansoni. It is widely distributed in the Neotropical zone, particularly in the North and Centre-West of Brazil and in the North of Bolivia. The aim of the present study was to determine the host-parasite relationship between B. amazonica and S. mansoni (BH and SJ strains). Specimens of B. amazonica and their snail-conditioned water were examined in terms of their ability to attract miracidia. The infectivity of the mollusks was determined by exposing them to 20 miracidia of both strains. Sporocyst development and amebocyte reactions were studied after each mollusk specimen was exposed to 100 miracidia. Although no cercariae were eliminated, specimens of B. amazonica proved capable of attracting 77% of the miracidia they were exposed to. Viable sporocysts with no amebocyte reaction were found 96 hours after the exposure to miracidia. These results indicate the susceptibility of B. amazonica to the BH and SJ strains of S. mansoni, and therefore demonstrate the importance of this planorbid species as a potential vector of the trematode in the areas where it occurs.Keywords: schistosomiasis, susceptibility, BH strain, SJ strain. Relação parasito-hospedeiro entre

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

Cited by 11 publications

References 19 publications

Morphological and molecular characterization of invasive Biomphalaria straminea in southern China

Morphological and molecular characterization of invasive Biomphalaria straminea in southern China

Identification of Biomphalaria sp. and other freshwater snails in the large-scale water transposition project in the Northeast of Brazil

Host-parasite relationship between Biomphalaria amazonica (Paraense, 1966) and Schistosoma mansoni (Sambon, 1907)

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