Table 2.

Bariatric Surgery-Induced Gut Microbiota Changes in Humans Compared to Preoperative Conditions

	Increase	Decrease
RYGB	Bacteroidetes71 Firmicutes81 Fusobacteria73,75 Proteobacteria73,75,78 Akkermansia79,80 Alistipes82 Bacteroides82 Citrobacter78,80 Fusobacterium73 Granulicatella73,80 Klebsiella79,80 Streptococcus76,79,80,83 Veillonella73,76,78,80 Alistipes shahii75,79 Streptococcus parasanguinis75,79 Streptococcus salivarius75 Streptococcus thermophilus75,79 Veillonella dispar75,78 Veillonella parvula75,78	Bacteroidetes81 Firmicutes78 Bifidobacteriaceae73 Anaerostipes78 Bacteroides79 Bifidobacterium73,82 Blautia76,80,82 Faecalibacterium78,83 Coprococcus comes78 Faecalibacterium prausnitzii75,78 Streptococcus salivarius83
SG	Bacteroidetes81 Fusobacteria74 Akkermansia73,79 Alistipes83 Fusobacterium74 Klebsiella79 Streptococcus79,83 Alistipes shahii79 Faecalibacterium prausnitzii84 Streptococcus parasanguinis79 Streptococcus salivarius83 Streptococcus thermophilus79	Firmicutes74 Bifidobacteriaceae73,74 Anaerostipes73 Bacteroides79 Bifidobacterium73 Coprococcus comes84