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Journal Articles Archives of Microbiology Year : 2019

Identification of the general stress stimulon related to colonization in Enterococcus faecalis

Abstract

Enterococcus faecalis has to cope with major stress conditions during colonization. To understand the effects of stress encountered during infection, the present study assessed the transcriptomic response of the bacteria facing exposure to serum, urine, bile salts, acid pH, or oxidative stress. Compared to non-stressed culture, 30% of the E. faecalis genes were differentially expressed. The transcriptome analysis reveals common but also specific responses, depending on stresses encountered: thus, urine exposure has the most important impact, and the highest number of genes with modified expression is involved in transport and metabolism. The results also pinpoint many stress-related sRNA or intergenic regions not yet characterized. This study identified the general stress stimulon related to infection: when the commensal bacterium initiates its response to stress related to infection, it increases its ability to survive to rough conditions for colonization, rather than promoting expression of virulence factors, and becomes this opportunistic pathogen that thrives in hospital settings.
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hal-02395869 , version 1 (05-12-2019)

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Marine Salze, Jean-Christophe Giard, Eliette Riboulet-Bisson, Torsten Hain, Alain Rincé, et al.. Identification of the general stress stimulon related to colonization in Enterococcus faecalis. Archives of Microbiology, 2019, ⟨10.1007/s00203-019-01735-8⟩. ⟨hal-02395869⟩
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