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Phylogeny of Trypanosoma (Megatrypanum) theileri and related trypanosomes reveals lineages of isolates associated with artiodactyl hosts diverging on SSU and ITS ribosomal sequences

Roderigues, A.C.; Paiva, F.; Campanar, M.; Stevens, J.R.; Noyes, H.A. and Teixeira, M.M.G. (2006) Phylogeny of Trypanosoma (Megatrypanum) theileri and related trypanosomes reveals lineages of isolates associated with artiodactyl hosts diverging on SSU and ITS ribosomal sequences. Parasitology, 132 (2). pp. 215-224. ISSN 0031-1820

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Abstract

SSU ribosomal sequences of trypanosomes from Brazilian cattle and water buffalo were used to infer phylogenetic relationships between non-pathogenic T. theileri and allied species parasitic in artiodactyls. T. theileri trypanosomes from distinct geographical regions in Brazil and from other countries were tightly clustered into the ‘clade T. theileri’ distant from the ‘T. brucei clade’ of pathogenic parasites of artiodactyls, and also distinct from trypanosomes of other mammals. The existence of this monophyletic assemblage (T. theileri clade) composed only by isolates from artiodactyl species justifies the continued recognition of the subgenus T. (Megatrypanum) with T. theileri as its type species. Phylogenies based on SSU and ITS1 ribosomal sequences produced the same branching pattern with isolates from different mammalian hosts clustered in 5 lineages: A, related to water buffalo; B, C and D, to cattle; E, to fallow deer. The pattern of host specificity allied to some congruence between host and parasite phylogenies suggested association of these trypanosomes with their respective hosts. Segregation of cattle isolates into three lineages revealed an overall geographical structure. Moreover, positioning of trypanosomes infecting tabanids in the T. theileri clade is consistent with the role of these flies as important vectors of these trypanosomes.

Item Type:Article
Additional Information:Issue 02 - Feb 2006; First published online 3 October 2005.
Uncontrolled Keywords:Trypanosoma theileria; Megatrypanum; Artiodactyla; cattle; buffalo; phylogeny; evolution; ribosomal gene; tabanid flies; DIPTERA-TABANIDAE; DISEASE AGENTS; DNA; AMPLIFICATION; DIAGNOSIS; RANGELI; EVANSI; GENE
Subjects:Q Science > QH Natural history > QH301 Biology
Q Science > QH Natural history > QH426 Genetics
Departments, Research Centres and Related Units:Academic Faculties, Institutes and Research Centres > Faculty of Science > Department of Biological Sciences
DOI:10.1017/S0031182005008929
Publisher's Statement:A. C. RODRIGUES, F. PAIVA, M. CAMPANER, J. R. STEVENS, H. A. NOYES and M. M. G. TEIXEIRA (2006). Phylogeny of Trypanosoma (Megatrypanum) theileri and related trypanosomes reveals lineages of isolates associated with artiodactyl hosts diverging on SSU and ITS ribosomal sequences. Parasitology, 132, pp 215-224 doi:10.1017/S0031182005008929. © Cambridge University Press 2007. http://journals.cambridge.org/action/displayIssue?jid=PAR&volumeId=132&issueId=02#
Refereed:Yes
Status:Published
ID Code:239
Deposited On:12 Aug 2008 10:12
Last Modified:20 May 2011 18:37

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