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预测的已知细菌菌株在样本中是否真的存在? 一个案例研究

Minerva Ventolero¹, Saidi Wang², Haiyan Hu³

¹Burnett School of Biomedical Science, College of Medicine, University of Central Florida, Orlando, Florida, United States of America.

|October 13, 2023

概括

细菌基因组的发展速度很快. 这项研究发现,以前识别的金黄色葡萄球菌和上皮葡萄球菌菌株不太可能存在于亚托邦性皮炎样本中,这突显了基于菌株的研究的局限性.

科学领域:

微生物学微生物学
基因组学就是基因组学.
生物信息学是一种生物信息学.

背景情况:

细菌基因组积累突变,引发了关于以前识别的菌株在当前样本中的持久性的问题.
亚托邦性皮肤炎 (AD) 与复杂的微生物群落有关,包括斯塔菲洛哥克菌种.

研究的目的:

调查已知黄金葡萄球菌和上皮葡萄球菌菌株在阿托皮性皮肤炎中存在的甲基因组样本.
评估菌株识别工具在检测先前表征的细菌菌株方面的可靠性.

主要方法:

分析了68个阿托皮性皮肤炎中位基因组样本.
使用原始研究预测和两个流行的生物信息学工具,对16种已知的S. aureus和S. epidermis菌株进行评估.
评估分析样本中菌株存在的可能性.

主要成果:

在最初的研究和使用相同工具的当前分析之间,只有两个已知的菌株得到了一致的预测.
在68个分析的亚托皮性皮肤炎样本中,没有任何16个已知的菌株可能存在.
即使使用相同的工具,在菌株预测中也观察到显著的差异.

结论:

基于已知菌株的研究存在局限性,特别是对于像斯塔菲洛哥克菌种等快速进化的细菌.
以前识别的细菌菌株可能无法在当前的环境或临床样本中可靠地存在.
为了更高的准确性,建议直接从猎枪元基因组数据中进行新的细菌菌株鉴定.

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