TABLE 1.

Gut microbiota dysbiosis and gastrointestinal disease.

Disease	Bacteria that decreases in number	Bacteria that increases in number	References
Colorectal cancer	Prevotella, Ruminococcus spp., Pseudobutyrivibrio remains	Acidaminobacter Phascolarcto bacterium Citrobacter farmer	Khoruts et al. (2010), Wang et al. (2019a)
Colon cancer	F.prausnitzii	Akkermansia muciniphila	Khoruts et al. (2010), Wang et al. (2019a)
Gastric cancer	Eubacteriumrectalie	Clostridium„Fusobacterium	Khoruts et al. (2010), Wang et al. (2019a)
IBD:Chron’sdisease	Bacteroides, Faecalibacterium prausnitzii, Bifidobacterium adolescentis		Kassam et al. (2013)
Ulcerative cholitis	Bifidobacteria, Roseburiahominis, Faecalibacterium prausnitzii Lachnospiraceae, Ruminococcaceae		Kassam et al. (2013)
Liver disease	Alistipes, Bilophila,Veillonella Faecalibacterium, Ruminococcus, Bifidobacterium, Prevotella Coprococcus, Veillonellaceae Prevotellacopri, Faecalibacterium Haemophilu	Claustridum, Bacteroidetes Betaproteobacteria Lactobacillusspp.,Collinsella, Corynebacterium, Prevotellaceae Ruminococcaceae Sarcina, Sutterellaceae	Paramsothy et al. (2017)
IBS	Bifidobacterium Faecalibacterium Bacteroides	Firmicutes: Bacteroidetes ratio Ruminococcus Dorea, Clostridium Gammaproteobacteria(pIBS) Haemophilus influenzae (IBS)	Ghoshal et al. (2012)
IBD	bacterial diversity Firmicutes, Bacteroidetes Lachnospiracheae Clostridium leptumand coccoides group (Faecalibacterium prausnitzii) Roseburia Phascolarctobacterium	bacterial numbers in mucosa (CD), Gamma–proteobacteria Enterobacteraceae adherent invasive Escherichia coli(CD), Clostridium spp.	Morgan et al. (2012)
Crohn’s Disease	Faecalibacterium prausnitzii, Roseburia	Akkermansia muciniphila, Bacteroides fragilis	Vich Vila et al. (2018)
Non-Alcoholic Fatty Liver Disease (NAFLD)	Bacteroides spp., Lactobacillus	Firmicutes (e.g., Roseburia, Akkermansia muciniphila)	Vallianou et al. (2021)
Peptic Ulcer Disease	Lactobacillus, Bifidobacterium	H. pylori	Guerra-Valle et al. (2022)