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Trypanosomatids are common and diverse parasites of Drosophila

机译：锥虫是果蝇的常见和多种寄生虫

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Drosophila melanogaster is an important model system of immunity and parasite resistance, yet most studies use parasites that do not naturally infect this organism. We have studied trypanosomatids in natural populations to assess the prevalence and diversity of these gut parasites. We collected several species of Drosophila from Europe and surveyed them for trypanosomatids using conserved primers for two genes. We have used the conserved GAPDH sequence to construct a phylogenetic tree and the highly variable spliced leader RNA to assay genetic diversity. All 5 of the species that we examined were infected, and the average prevalence ranged from 1 to 6%. There are several different groups of trypanosomatids, related to other monoxenous Trypanosomatidae. These may represent new trypanosomatid species and were found in different species of European Drosophila from different geographical locations. The detection of a little studied natural pathogen in D. melanogaster and related species provides new opportunities for research into both the Drosophila immune response and the evolution of hosts and parasites.
机译：果蝇是免疫和寄生虫抵抗力的重要模型系统，但是大多数研究使用的寄生虫不是自然感染该生物的。我们已经研究了自然种群中的锥虫病，以评估这些肠道寄生虫的患病率和多样性。我们从欧洲收集了几种果蝇，并使用两个基因的保守引物对它们进行了锥虫病调查。我们已经使用保守的GAPDH序列来构建系统发育树，并使用高度可变的剪接前导RNA来分析遗传多样性。我们检查的所有5个物种均被感染，平均患病率为1％至6％。锥虫有几种不同的类别，与其他单异性锥虫科有关。这些可能代表了新的锥虫病物种，并在不同地理位置的欧洲果蝇的不同物种中发现。在黑腹果蝇（D. melanogaster）和相关物种中检测到一些经过研究的自然病原体，为果蝇免疫应答以及宿主和寄生虫的进化研究提供了新的机会。

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