| Publication Type: | Journal Article |
| Year of Publication: | 2006 |
| Authors: | A. C. Rodrigues, Paiva, F., Campaner, M., Stevens, J. R., Noyes, H. A., Teixeira, M. M. G. |
| Journal: | Parasitology |
| Volume: | 132 |
| Pagination: | 215-224 |
| Date Published: | February |
| Type of Article: | Article |
| ISBN Number: | 0031-1820 |
| Keywords: | [Brazil / / ]., [Mammalian hosts / Bos, ] [Molecular genetics / / ] [Phylogeny / / ] [Dipteran hosts /, Biochemistry, Bubalus & Dama / taxonomic & phylogenetic, Dama dama (Cervidae): [Host]., Dama dama [Protozoan parasites / Trypanosoma (Megatrypanum) theileri /, disorders, Eurasia, Europe, Evolution, Genetics, Hosts, Insect hosts, Land zones, molecular confirmation], molecular confirmation] [Transmission of parasites /, Neotropical region, Palaearctic region, Parasites, Parasites diseases and, protozoan, rDNA sequence, significance] [Germany / / ] [Brazil / / ]., South America, Systematics, Tabanidae (Orthorrhapha): [Parasite]., Tabanidae [Mammalian hosts / Bos taurus & Bubalus bubalis / Vector of, Tabanidae / Vectors to mammalian hosts, taxonomic & phylogenetic significance] [Germany / / ]., transmission, Trypanosoma (Megatrypanum) theileri (Kinetoplastida): [Parasite]., Trypanosoma (Megatrypanum) theileri (Protozoa) / To mammalian hosts], Trypanosoma (Megatrypanum) theileri [Nucleic acids / rDNA sequences / |
| 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. |
| URL: | <Go to ISI>://ZOOREC:ZOOR14207041968 |