through nutrient depletion, specifically by reducing the levels of fructose. Finally, in vivo RNA-Seq analysis of each bacterial isolate of the consortium in combination with ex vivo and in vivo assays demonstrated that a single bacterium (Olsenella sp.) could recapitulate the protective effect.Altogether, the results obtained have identified the function of specific genes required by VRE to colonize the gut. In addition, we have identified a specific mechanism by which the microbiota confers protection against VRE colonization. These results could lead to novel therapeutic approaches to prevent infections caused by this multidrug-resistant pathogen.ARN-Seq in vivo de cada aislado en combinación con los ensayos ex vivo e in vivo demostraron que una sola bacteria (Olsenella sp.) proporciona protección.En conjunto, los resultados obtenidos han identificado la función de genes específicos requeridos por ERV para colonizar el intestino. Además, hemos identificado un mecanismo mediante el cual la microbiota confiere protección. Estos resultados podrían conducir a nuevos enfoques terapéuticos para prevenir las infecciones causadas por este patógeno multiresistente a los antibióticos.En conjunt, els resultats obtinguts han identificat la funció de gens específics requerits per ERV per a colonitzar l'intestí. A més, hem identificat un mecanisme mitjançant el qual la microbiota confereix protecció. Aquests resultats podrien conduir a nous enfocaments terapèutics per a previndre les infeccions causades per aquest patogen multiresistent als antibiòtics.
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