Lung inflammation, NLRP3 inflammasome activity, cytokines, bacterial load, and secretory IgA (sIgA) were assessed.<h4>Results</h4>Hypobaric hypoxia triggered gut dysbiosis, marked by reduced abundance of Firmicutes D and Lactobacillus, elevated Bacteroidota, and decreased SCFA levels..FMT restored microbiota composition, increased acetic and butyric acid levels, and attenuated lung inflammation. This evidence concerns the gene CD79A and inflammatory response.