Humans have intestinal bacteria that degrade the plant cell walls in herbivores

Table 1 Enterobacteria that break down fibers derived from cell walls

Family	Genus		Species	Putative effects	Horse		Human
						Ref.		Ref.
Acidaminococcaceae	Phascolarctobacterium	spp.		Fiber fermenters	+	[21]	+	[22]
Bacteroidaceae	Bacteroides	spp.		Plant wall degradation	+	[7]	+	[7]
			ovatus	Polysaccharide decomposition; Plant wall degradation	N/A		+	[9]
			thetaiotaomicron	Complex polysaccharide decomposition	N/A		+	[9]
Clostridiaceae	Clostridium	spp.		Cellulolytic, fibrolytic	+	[8]	+	[23]
Eubacteriaceae	Eubacterium	spp.		Cellulolytic, fibrolytic	+	[8]	+	[23]
Fibrobacteraceae	Fibrobacter	spp.		Plant wall degradation	+	[7]	N/A
			intestinalis	Plant wall degradation	+	[24]	N/A
Lachnospiraceae	Butyrivibrio	spp.		Cellulolytic, fibrolytic	+	[8]	+	[25]
	Blautia	spp.		Fiber fermenters	+	[26]	+	[27]
Prevotellaceae	Prevotella	spp.		Fiber fermenters	+	[26]	+
			copri	Fiber fermenters	N/A		+	[28]
Ruminococcaceae	Ruminococcus	spp.		Cellulolytic, fibrolytic bacteria	+	[8]	+
			albus	Plant wall degradation	+	[8]	+	[29]
			bromii	Plant wall degradation	N/A		+	[30]
			champanellensis sp.nov.	Plant wall degradation	N/A		+	[31]
			flavefaciens	Plant wall degradation	+	[32]	+	[33]
			sp.nov.	Plant wall degradation	N/A		+	[34]

Based on the intestinal flora of horses compiled by Kauter et al[8], we selected microorganisms that decompose cell walls and summarized whether they exist in the human large intestine. Several bacterial species reported in humans as cell wall-degrading bacteria are added to the Table. N/A: Not available.