Listeria monocytogenes faecal carriage is common and depends on the gut microbiota.

Listeria monocytogenes faecal carriage is common and depends on the gut microbiota.
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DOI:
10.1038/s41467-021-27069-y
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发表时间:
2021-11-24
影响因子:
16.6
通讯作者:
Lecuit M
Lecuit M
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Hafner L;Pichon M;Burucoa C;Nusser SHA;Moura A;Garcia-Garcera M;Lecuit M

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李斯特菌属包括两种致病菌:单核细胞增生李斯特菌 (Lm) 和伊万诺维李斯特菌,以及非致病菌。所有物种都可以作为腐生菌繁衍生息,而只有致病菌才会引起全身感染。识别李斯特菌物种各自的生境对于了解李斯特菌毒力的生态贡献至关重要。为了调查不同来源的李斯特菌物种的流行率和丰度,我们从 MG-RAST 宏基因组数据库中检索并分析了 16S rRNA 数据集。 26% 的数据集包含严格李斯特菌序列,Lm 是最常见的物种,在土壤和宿主相关环境中含量最丰富,包括 5% 的人类粪便。在 900 名健康无症状捐献者的独立队列中,10% 的人类粪便样本中也检测到了 Lm。在人类和实验接种的小鼠中,特定的微生物群特征与 Lm 粪便携带有关,在小鼠中,它先于 Lm 粪便携带。这些结果表明,Lm 粪便携带很常见,并且取决于肠道微生物群,并表明 Lm 粪便携带是其毒力的一个重要但被忽视的后果。在这里,作者表明,单增李斯特菌粪便携带在健康无症状个体中很常见,并且结合小鼠研究,他们将携带单核细胞增多症与特定的微生物组特征联系起来。
Listeria genus comprises two pathogenic species, L. monocytogenes (Lm) and L. ivanovii, and non-pathogenic species. All can thrive as saprophytes, whereas only pathogenic species cause systemic infections. Identifying Listeria species’ respective biotopes is critical to understand the ecological contribution of Listeria virulence. In order to investigate the prevalence and abundance of Listeria species in various sources, we retrieved and analyzed 16S rRNA datasets from MG-RAST metagenomic database. 26% of datasets contain Listeria sensu stricto sequences, and Lm is the most prevalent species, most abundant in soil and host-associated environments, including 5% of human stools. Lm is also detected in 10% of human stool samples from an independent cohort of 900 healthy asymptomatic donors. A specific microbiota signature is associated with Lm faecal carriage, both in humans and experimentally inoculated mice, in which it precedes Lm faecal carriage. These results indicate that Lm faecal carriage is common and depends on the gut microbiota, and suggest that Lm faecal carriage is a crucial yet overlooked consequence of its virulence. Here, the authors show that Listeria monocytogenes faecal carriage is common in healthy asymptomatic individuals and, together with mouse studies, they associate carriage with a specific microbiome signature.
DOI: 10.1038/nri3535
发表时间: 2013-11
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