Table 1.

Main representatives for taxonomic gut microbial composition, adapted from Rinninella et al. [18].

Main GI PHYLUM	CLASS Examples	ORDER Examples	FAMILY Examples	GENUS Examples	SPECIES Examples
Actinomycetota	Actinobacteria	Actinomycetales	Corynebacteriaceae	Corynebacterium
		Bifidobacteriales	Bifidobacteriaceae	Bifidobacterium	Bifidobacterium longum Bifidobacterium bifidum
	Coriobacteria	Coriobacteriales	Coriobacteriaceae	Atopobium
Bacillota	Clostridia	Clostridiales	Clostridiaceae	Faecalibacterium	Faecalibacterium prausnitzii
				Clostridium	Clostridum spp.
			Lachnospiraceae	Roseburia	Roseburia intestinalis
			Ruminococcaceae	Ruminococcus	Ruminococcus faecis
	Negativicutes	Veillonellales	Veillenellaceae	Dialister	Dialister invisus
	Bacili	Lactobacillales	Lactobacillaceae	Lactobacillus	Lactobacillus reuteri
			Enterococcaceae	Enterococcus	Enterococcus faecium
		Bacillales	Staphylocaccaceae	Staphylococcus	Staphylococcus leei
Bacteroidota	Sphingobacteria	Sphingobacteriales	Sphingobacteriaceae	Sphingobacterium
	Bacteroidia	Bacteroidales	Bacteridaceae	Bacteroides	Bacteroides fragilis
					Bacteroides vulgatus
					Bacteroides uniformis
			Tannerellaceae	Tanarella
				Parabacteroides	Parabacteroides diastonis
			Rikenellaceae	Alistipes	Alistipes finegolddi
			Prevotellaceae	Prevotella	Prevotella spp.
Pseudomonadota	Gamma proteobacteria	Enterobacterales	Enterobacteriaceae	Escherichia	Escherichia coli
				Shigella	Shigella flexneri
	Delta proteobacteria	Desulfovibrionales	Desulfovibrionaceae	Desulfovibrio	Desulfovibrio intestinalis
				Bilophila	Bilophila wadsworthia
	Epsilon proteobacteria	Campylobacterales	Helicobacteraceae	Helicobacter	Helicobacter pylori
Verrucomicrobia	Verrucomicrobiae	Verrucomicrobiales	Akkermansiaceae	Akkermansia	Akkermansia muciniphila