New insights into the phylogeny of Entamoeba species provided by analysis of four new small-subunit rRNA gene sequences

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dc.contributor.author Clark, C. Graham
dc.contributor.author Kaffashian, Farrokh
dc.contributor.author Tawari, Blessing
dc.contributor.author Windsor, Jeffrey J.
dc.contributor.author Twigg-Flesner, Anke
dc.contributor.author Davies-Morel, Mina Clare Gwynne
dc.contributor.author Blessmann, Joerg
dc.contributor.author Ebert, Frank
dc.contributor.author Peschel, Babett
dc.contributor.author Le Van, An
dc.contributor.author Jackson, Colin John
dc.contributor.author Macfarlane, L
dc.contributor.author Tannich, E
dc.date.accessioned 2009-07-22T13:26:53Z
dc.date.available 2009-07-22T13:26:53Z
dc.date.issued 2006
dc.identifier.citation Clark , C G , Kaffashian , F , Tawari , B , Windsor , J J , Twigg-Flesner , A , Davies-Morel , M C G , Blessmann , J , Ebert , F , Peschel , B , Le Van , A , Jackson , C J , Macfarlane , L & Tannich , E 2006 , ' New insights into the phylogeny of Entamoeba species provided by analysis of four new small-subunit rRNA gene sequences ' International Journal of Systematic and Evolutionary Microbiology , vol 56 , no. 9 , pp. 2235-2239 . , 10.1099/ijs.0.64208-0 en
dc.identifier.issn 1466-5034
dc.identifier.other PURE: 113251
dc.identifier.other dspace: 2160/2713
dc.identifier.uri http://hdl.handle.net/2160/2713
dc.identifier.uri http://ijs.sgmjournals.org/cgi/content/abstract/56/9/2235 en
dc.description Clark, C. G., Kaffashian, F., Tawari, B., Windsor, J. J., Twigg-Flesner, A., Davies Morel, M. C. G., Blessmann, J., Ebert, F., Peschel, B., Le Van, A., Jackson, C. J., Macfarlane, L., Tannich, E. (2006). New insights into the phylogeny of Entamoeba species procided by analysis of four new small-subunit rRNA genes. International Journal of Systematic and Evolutionary Microbiology, 56, (9), 2235-2239. Sponsorship: Part of this work was supported by a grant from the Biotechnology and Biological Sciences Research Council (UK) to C. G. C. (grant #G18391). A portion of this work formed part of an MSc thesis submitted by A. Twigg Flesner and was supported by a grant from the Institute of Biomedical Sciences (IBMS). en
dc.description.abstract Sequences of small-subunit rRNA genes have been obtained for four new isolates of Entamoeba. Phylogenetic analyses give new insights into the evolution of these organisms. A novel Entamoeba from pigs in Vietnam that produces uninucleate cysts proved to be unrelated to other uninucleated cyst-producing species. Revival of the name Entamoeba suis for this organism is proposed. Instead of being related to Entamoeba polecki, it shares a recent common ancestor with the non-encysting Entamoeba gingivalis in a lineage that is basal to the tetranucleate cystproducing clade. This suggests that species producing cysts with four nuclei are descended from an ancestor that produced cysts with a single nucleus. An Entamoeba from a horse was isolated in culture. No cysts were observed in the original stool sample but the sequence is placed unequivocally within the clade of tetranucleate cyst-producing species with no other sequences being specifically related. Revival of the name Entamoeba equi for this organism is proposed. The Entamoeba ecuadoriensis sequence was found to be the most closely related to Entamoeba histolytica and Entamoeba dispar, as predicted, despite the organism having been an environmental isolate originally assigned to Entamoeba moshkovskii. Finally, a partial E. polecki gene sequence from a pig proved to be virtually identical to that of Entamoeba struthionis from an ostrich, suggesting that the latter name is a synonym. en
dc.format.extent 5 en
dc.language.iso eng
dc.relation.ispartof International Journal of Systematic and Evolutionary Microbiology en
dc.title New insights into the phylogeny of Entamoeba species provided by analysis of four new small-subunit rRNA gene sequences en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.identifier.doi http://dx.doi.org/10.1099/ijs.0.64208-0
dc.contributor.institution Institute of Biological, Environmental and Rural Sciences en
dc.description.status Peer reviewed en


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