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Identification of Synapomorphic Characteris in the Genus Sarcocystis Based on 18S rDNA Sequence Comparison

1997; Wiley; Volume: 44; Issue: 5 Linguagem: Inglês

10.1111/j.1550-7408.1997.tb05713.x

1550-7408

Alex C. Jeffries, BEATE SCHNITIZLER, A. O. Heydorn, Alan M. Johnson, A.M. Tenter,

Yersinia bacterium, plague, ectoparasites research

In order to further investigate synapomorphic characters in the genus Sarcocystis, the small subunit ribosomal RNA gene sequences of Sarcocystis capracanis and Sarcocystis moulei were determined and used to infer the phylogenetic position of these two organisms within the cyst-forming coccidia. Phylogenies derived using distance, maximum parsimony and maximum likelihood methods demonstrated that S. capracanis groups with Sarcocystis tenella and Sarcocystis arieticanis as a clade that shares the characteristic of using canids as their definitive host. S. moulei was shown to group with Sarcocystis gigantea and Sarcocystis fusiformis as a clade that shares the characteristic of using fields as their definitive host.