JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
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Morphological and Phylogenetic Description of Trypanosoma noyesi sp. nov.: An Australian Wildlife Trypanosome within the T. cruzi Clade.

Protist 2016 November
A number of trypanosome isolates from Australian marsupials are within the clade containing the human pathogen Trypanosoma cruzi. Trypanosomes within this clade are thought to have diverged from a common ancestral bat trypanosome. Here, we characterise Trypanosoma noyesi sp. nov. isolated from the critically endangered woylie (Bettongia pencillata) using phylogenetic inferences from three gene regions (18S rDNA, gGAPDH, and CytB) coupled with morphological and behavioural observations in vitro. We also investigated potential vectors and the presence of T. noyesi in the grey-headed flying fox (Pteropus poliocephalus). Phylogenetic analysis revealed T. noyesi and similar genotypes grouped at the periphery of the T. cruzi clade. T. noyesi is morphologically distinct both from other species of Australian trypanosomes and those within the T. cruzi clade. Although trypanosomes were not observed in the digestive tract of ectoparasites and biting flies collected from T. noyesi infected marsupials, tabanid and biting midges tested positive for T. noyesi DNA, indicating they are vector candidates. Tissues from flying foxes were negative for T. noyesi. This study provides novel information on the morphology and genetic variability of an Australian trypanosome within the T. cruzi clade.

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