Table 2.

Bacteria found in significantly different abundance in CRC, adenomas and controls in at least two studies.

Bacteria taxonomic level				Reported to be more abundant in:
Phylum	Order/Famliy	Genus	Species	CRC	Adenomas	Controls
Actinobacteria				[24]	[35]	[31]
	Bifidobacteriaceae	Bifidobacterium				[22, 38, 39, 48, 61, 62]
	[Actinomycetaceae]	Actinomyces		[34, 36]	[35]
	[Coriobacteriaceae]	Atopobium		[34]	[36]
			Eggerthella lenta	[25, 51]
Bacteroidetes				[21, 24, 26, 48, 49]	[31, 37]	[24, 26, 37, 47]
	Porphyromonadaceae	Porphyromonas		[22, 26, 29]	[39]
			Porphyromonas asaccharolytica	[15, 25, 50, 59]
	[Bacteroidaceae]	Bacteroides		[28, 29]		[23, 26]
			Bacteroides fragilis	[34]	[30, 39]	[61]
	[Prevotellaceae]	Prevotella		[28]		[23]
Firmicutes				[26, 29, 48]	[35]	[21, 24, 26, 31, 35, 37, 47]
	Ruminococcaceae	Ruminococcus		[23, 38]	[29]	[48]
		Faecalibacterium	Faecalibacterium prausnitzii	[43]		[69]
	[Clostridiaceae]	Clostridium		[23]	[29]
			Clostridium symbiosum	[52, 58, 69]	[58]
	Streptococcaceae	Streptococcus		[23, 26]	[35]	[24, 48]
	[Lachnospiraceae]	Coprococcus		[50]	[53]	[53]
		Lactobacillus		[28]		[39]
		Roseburia				[23, 26, 39]
			Roseburia faecis			[25, 51]
	[Enterococcaceae]	Enterococcus		[26, 32]
			Enterococcus faecalis	[46]	[30, 77]
	[Peptostreptococcaceae]	Peptostreptococcus		[22, 23, 26, 36]
			Peptostreptococcus stomatis	[15, 34, 52, 59]
	[Acidaminococcaceae]	Phascolarctobacterium		[29]	[35]	[38]
Fusobacteria				[29, 35, 38]
	[Fusobacteriaceae]	Fusobacterium		[22, 23, 32, 34, 36, 50, 54, 67]	[36]
			Fusobacterium nucleatum	[15, 34, 43, 52–54, 58, 59, 75, 79]	[30, 58, 77, 81]
Tenericutes				[26]	[35]	[35]
	Alcaligenaceae				[22, 35]	[27]
	Enterobacteriaceae	Salmonella		[27, 46]		[36]
			Escherichia coli	[43, 49]
	[Pseudomonadaceae]	Pseudomonas		[61]	[29]

Bacteria in square brackets were not reported on this level and are there for reference.

The number represents the corresponding order of the sited reference in the manuscript.