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首页> 外文期刊>Parasitology >The finch epidemic strain of Trichomonas gallinae is predominant in British non-passerines
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The finch epidemic strain of Trichomonas gallinae is predominant in British non-passerines

机译：在英国的非雀形目鸟类中，雀科流行的雀科流行性菌株为流行

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摘要

Avian trichomonosis, caused by the flagellated protozoan Trichomonas gallinae, is a recently emerged infectious disease of British passerines. The aetiological agent, a clonal epidemic strain of the parasite, has caused unprecedented finch mortality and population-level declines in Britain and has since spread to continental Europe. To better understand the potential origin of this epidemic and to further investigate its host range, T. gallinae DNA extracts were collected from parasite culture and tissue samples from a range of avian species in Britain. Sequence typing at the ITS1/5.8S rRNA/ITS2 region resolved three distinct ITS region types circulating in free-ranging British birds. Subtyping by sequence analyses at the Fe-hydrogenase gene demonstrated further strain variation within these ITS region types. The UK finch epidemic strain was preponderant amongst columbids sampled, however, wide strain diversity was encountered in isolates from a relatively small number of pigeons, suggesting further strains present in columbid populations across the UK are yet to be identified. Fe-hydrogenase gene sequence data in isolates from birds of prey with disease were predominantly identical to the UK finch epidemic strain, demonstrating its presence as a virulent strain in UK birds of prey since at least 2009.
机译：禽毛滴虫病是由鞭毛原生动物毛滴虫造成的，是最近出现的英国雀形目的传染病。病原体是该寄生虫的一种克隆流行病，在英国造成了史无前例的雀科死亡率和人口水平的下降，此后已传播到欧洲大陆。为了更好地了解这种流行病的潜在起源并进一步研究其宿主范围，从英国一系列鸟类的寄生虫培养物和组织样本中收集了鸡毛衣原体DNA提取物。 ITS1 / 5.8S rRNA / ITS2区的序列分型解决了自由放养的英国鸟类中循环的三种不同的ITS区类型。通过对Fe-加氢酶基因的序列分析进行亚型分析，证实了在这些ITS区域类型内菌株的进一步变异。 UK雀科流行病株在所采集的co群中占优势，但是，从相对少数的鸽子中分离出的品系中却遇到了广泛的株系多样性，这表明在整个英国的lum群中存在着更多的毒株。患有疾病的猛禽中分离出的Fe-氢酶基因序列数据与UK Finch流行株基本相同，这表明自2009年以来，它一直是英国猛禽中的强毒株。

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