Averis S, Thompson R C A, Lymbery A J, Wayne A F, Morris K D, Smith A
WHO Collaborating Centre for the Molecular Epidemiology of Parasitic Infections, State Agricultural Biotechnology Centre, School of Veterinary and Biomedical Sciences, Murdoch University, South Street, Western Australia 6150, Australia.
Parasitology. 2009 Sep;136(11):1269-79. doi: 10.1017/S0031182009990801. Epub 2009 Aug 7.
Little is known regarding the diversity, distribution or host-parasite associations of Trypanosoma spp. in Australian wildlife. Here we report on an investigation based on divergence of the 18S rRNA gene of trypanosomes isolated from a range of hosts and varied geographical locations. A total of 371 individuals representing 19 species of native animals from 14 different locations were screened. In total, 32 individuals from 9 different species tested positive for the parasite. Phylogenetic analysis revealed considerable parasite diversity with no clear geographical distribution and no evidence of host specificity. In general, it appears that Australian Trypanosoma spp. are widespread, with several genotypes appearing in multiple host species and in varied locations including both mainland areas and offshore islands. Some host species were found to be susceptible to multiple genotypes, but no individuals were infected with more than a single isolate.
关于澳大利亚野生动物中锥虫属的多样性、分布或宿主-寄生虫关联，我们知之甚少。在此，我们报告一项基于从一系列宿主和不同地理位置分离出的锥虫18S rRNA基因差异的调查。共筛选了来自14个不同地点、代表19种本土动物的371个个体。总体而言，来自9个不同物种的32个个体检测出该寄生虫呈阳性。系统发育分析显示，寄生虫具有相当大的多样性，没有明确的地理分布，也没有宿主特异性的证据。一般来说，澳大利亚的锥虫属似乎分布广泛，有几种基因型出现在多个宿主物种以及包括大陆地区和近海岛屿在内的不同地点。一些宿主物种被发现易受多种基因型感染，但没有个体感染超过一种分离株。
