Ruminococcus gnavus, an unfriendly bacterium
Even more than asthma, with which it is strongly associated, allergic rhinitis is the most common and consistent manifestation of respiratory allergy. Repeated sneezing, continuously runny or blocked nose, irritated eyes: these are the main symptoms of this pathology which affects 25% of the general population in France and half a billion people worldwide20. As with any allergy, it has a significant hereditary component and the symptoms it triggers are caused by an excessive immune system response to allergens (mites, pollens, cat hairs). Moreover, dysbiosis of the intestinal and ENT microbiota have already been associated with these respiratory disorders. There still needs to be a better understanding of the onset period and which bacteria generate them. It is a necessary step to designing treatments that are an alternative and/or an addition to current standard management methods (elimination of the allergen, drugs and desensitization), such as a rebalancing of the microbiota…

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