Evolutionary relationships and biogeography of Biomphalaria (Gastropoda: Planorbidae) with implications regarding its role as host of the human bloodfluke, Schistosoma mansoni

Dejong, Randall J., Morgan, Jess A. T., Paraense, W. Lobato, Pointier, Jean-Pierre, Amarista, Manuel, Ayeh-Kumi, Patrick F. K., Babiker, Ahmed, Barbosa, Constanca S., Bremond, Philippe, Canese, Andres Pedro, de Souza, Cecilia Pereira, Dominguez, Claudio, File, Sharon, Gutierrez, Alfredo, Incani, R. Nino, Kawano, Toshie, Kazibwe, Francis, Kpikpi, John, Lwambo, Nicholas J. S., Mimpfoundi, Remy, Njiokou, Flobert, Poda, Jean Noel, Sene, M., Velasquez, Luz Elena, Yong, Mary, Adema, Coen M., Hofkin, Bruce V., Mkoji, Gerald M. and Loker, Eric S. (2001) Evolutionary relationships and biogeography of Biomphalaria (Gastropoda: Planorbidae) with implications regarding its role as host of the human bloodfluke, Schistosoma mansoni. Molecular Biology and Evolution, 18 12: 2225-2239.

Author Dejong, Randall J.
Morgan, Jess A. T.
Paraense, W. Lobato
Pointier, Jean-Pierre
Amarista, Manuel
Ayeh-Kumi, Patrick F. K.
Babiker, Ahmed
Barbosa, Constanca S.
Bremond, Philippe
Canese, Andres Pedro
de Souza, Cecilia Pereira
Dominguez, Claudio
File, Sharon
Gutierrez, Alfredo
Incani, R. Nino
Kawano, Toshie
Kazibwe, Francis
Kpikpi, John
Lwambo, Nicholas J. S.
Mimpfoundi, Remy
Njiokou, Flobert
Poda, Jean Noel
Sene, M.
Velasquez, Luz Elena
Yong, Mary
Adema, Coen M.
Hofkin, Bruce V.
Mkoji, Gerald M.
Loker, Eric S.
Title Evolutionary relationships and biogeography of Biomphalaria (Gastropoda: Planorbidae) with implications regarding its role as host of the human bloodfluke, Schistosoma mansoni
Journal name Molecular Biology and Evolution   Check publisher's open access policy
Publication date 2001-12
Sub-type Article
Volume number 18
Issue number 12
ISSN 0737-4038
1537-1719
Start page 2225
End page 2239
Total pages 15
Place of publication Cary, NC, United States
Publisher Oxford University Press
Language eng
Abstract The wide geographic distribution of Schistosoma mansoni, a digenetic trematode and parasite of humans, is determined by the occurrence of its intermediate hosts, freshwater snails of the genus Biomphalaria (Preston 1910). We present phylogenetic analyses of 23 species of Biomphalaria, 16 Neotropical and seven African, including the most important schistosome hosts, using partial mitochondrial ribosomal 16S and complete nuclear ribosomal ITS1 and ITS2 nucleotide sequences. A dramatically better resolution was obtained by combining the data sets as opposed to analyzing each separately, indicating that there is additive congruent signal in each data set. Neotropical species are basal, and all African species are derived, suggesting an American origin for the genus. We confirm that a proto-Biomphalaria glabrata gave rise to all African species through a trans-Atlantic colonization of Africa. In addition, genetic distances among African species are smaller compared with those among Neotropical species, indicating a more recent origin. There are two species-rich clades, one African with B. glabrata as its base, and the other Neotropical. Within the African clade, a wideranging tropical savannah species, B. pfeifferi, and a Nilotic species complex, have both colonized Rift Valley lakes and produced endemic lacustrine forms. Within the Neotropical clade, two newly acquired natural hosts for S. mansoni (B. straminea and B. tenagophila) are not the closest relatives of each other, suggesting two separate acquisition events. Basal to these two species-rich clades are several Neotropical lineages with large genetic distances between them, indicating multiple lineages within the genus. Interesting patterns occur regarding schistosome susceptibility: (1) the most susceptible hosts belong to a single clade, comprising B. glabrata and the African species, (2) several susceptible Neotropical species are sister groups to apparently refractory species, and (3) some basal lineages are susceptible. These patterns suggest the existence of both inherent susceptibility and resistance, but also underscore the ability of S. mansoni to adapt to and acquire previously unsusceptible species as hosts. Biomphalaria schrammi appears to be distantly related to other Biomphalaria as well as to Helisoma, and may represent a separate or intermediate lineage.
Keyword Biomphalaria
Schistosoma mansoni
Biogeography
Phylogeny
Snails
Data congruence
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article
Collection: Queensland Alliance for Agriculture and Food Innovation
 
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