Fig. 4From: Intestinal flora imbalance affects bile acid metabolism and is associated with gallstone formationa At the phylum level, the number of Firmicutes was significantly reduced in the gallstone group, and the Firmicutes/Bacteroidetes (F/B) ratio was also significantly decreased. Cyanobacteria, Fusobacteria, and Spirochaetes were significantly increased in the gallstone group. b The structure and relative abundance of the flora in the two groups at the class, order, family, genus, and species levels. c At the genus level, the gallstone and control groups were compared, and the bacteria with significantly increased abundance are shown. d The bacteria with significantly reduced abundance are shown. Data are expressed as the mean ± SD, *p < 0.05, **p < 0.01, ***p < 0.001, ns > 0.05. Statistically significant differences (p < 0.05) between the two groups were determined by Mann-Whitney U testBack to article page