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用于……的共识多位点序列分型方案

Consensus Multilocus Sequence Typing Scheme for .

作者信息

Pasic Lana, Goterris Lidia, Guerrero-Murillo Mercedes, Irinyi Laszlo, Kan Alex, Ponce Carolina A, Vargas Sergio L, Martin-Gomez M Teresa, Meyer Wieland

机构信息

Molecular Mycology Research Laboratory, Centre for Infectious Diseases and Microbiology, Westmead Clinical School, Sydney Medical School, Faculty of Medicine and Health, The University of Sydney, Sydney 2006, Australia.

Marie Bashir Institute for Infectious Diseases and Biosecurity, The University of Sydney, Sydney 2006, Australia.

出版信息

J Fungi (Basel). 2020 Oct 30;6(4):259. doi: 10.3390/jof6040259.

Abstract

is an opportunistic human pathogenic fungus causing severe pneumonia mainly in immunocompromised hosts. Multilocus sequence typing (MLST) remains the gold standard for genotyping of this unculturable fungus. However, the lack of a consensus scheme impedes a global comparison, large scale population studies and the development of a global MLST database. To overcome this problem this study compared all genetic regions (19 loci) currently used in 31 different published MLST schemes. The most diverse/commonly used eight loci, , , , ITS1, ITS1/2, and , were further assess for their ability to be successfully amplified and sequenced, and for their discriminatory power. The most successful loci were tested to identify genetically related and unrelated cases. A new consensus MLST scheme consisting of four genetically independent loci: , , and , is herein proposed for standardised typing, successfully amplifying low and high fungal burden specimens, showing adequate discriminatory power, and correctly identifying suspected related and unrelated isolates. The new consensus MLST scheme, if accepted, will for the first time provide a powerful tool to investigate outbreak settings and undertake global epidemiological studies shedding light on the spread of this important human fungal pathogen.

摘要

是一种机会性人类致病真菌,主要在免疫功能低下的宿主中引起严重肺炎。多位点序列分型(MLST)仍然是这种不可培养真菌基因分型的金标准。然而,缺乏统一的方案阻碍了全球范围内的比较、大规模群体研究以及全球MLST数据库的开发。为解决这一问题,本研究比较了目前在31种不同的已发表MLST方案中使用的所有基因区域(19个位点)。对最多样化/最常用的8个位点,即、、、ITS1、ITS1/2、和,进一步评估其成功扩增和测序的能力以及鉴别力。对最成功的位点进行测试,以识别基因相关和不相关的病例。本文提出了一种新的共识MLST方案,该方案由4个基因独立的位点组成:、、和,用于标准化分型,能成功扩增低真菌负荷和高真菌负荷的标本,显示出足够的鉴别力,并能正确识别疑似相关和不相关的分离株。如果新的共识MLST方案被接受,将首次提供一个强大的工具来调查暴发情况并开展全球流行病学研究,以阐明这种重要的人类真菌病原体的传播情况。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e85e/7711988/92451d3b68cd/jof-06-00259-g001.jpg

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