TABLE 5.

Genera and species that were affected by meat intake as reported by at least 2 studies.

Bacteria	Study	Higher meat intake	Lower meat intake	Higher vs lower1
Genera
Bacteroides	van Faassen et al. 1987 [85]	Post-omnivorous	Post-vegan	↔
		Post-omnivorous	Post-vegetarian	↔
		Post-vegetarian	Post-vegan	↔
	Hess et al. 2018 [84]	Post-red meat	Post-mushroom	↓
	Kohnert et al. 2021 [91]	Post-pre-omnivorous	Post-pre, post-, or pre-vegan	↔2
Anaerostipes	Hess et al. 2018 [84]	Post-red meat	Post-mushroom	↓
	Kahleova et al. 2020 [89]	Pre-vegan	Post-vegan	↓
	Pagliai et al. 2020 [74]	Post-pre-Mediterranean	Post-pre-vegetarian	↓
		Pre-vegetarian	Post-vegetarian	↓
Ruminococcus	Lang et al. 2018 [87]	Red/white meat	Nonmeat	Differed3
	Crimarco et al. 2020 [88]	Animal-based diet	Plant-based diet	↑
	Kohnert et al. 2021 [91]	Post-pre-omnivorous	Post-pre-vegan	↓
		Post-omnivorous	Pre-omnivorous	↔2
		Pre-vegan	Post-vegan	↔2
Roseburia	Crimarco et al. 2020 [88]	Animal-based diet	Plant-based diet	↑
	Meslier et al. 2020 [92]	Post-omnivorous (higher nonfish meat)	Post-Mediterranean diet (higher fish)	↓
	Kohnert et al. 2021 [91]	Post-pre-omnivorous	Post-pre-vegan	↑
		Post-omnivorous	Pre-omnivorous	↑
		Pre-vegan	Post-vegan	↑
Species
Faecalibacterium prausnitzii	Kahleova et al. 2020 [89]	Post-pre-omnivorous	Post-pre-vegan	↓
		Pre-vegan	Post-vegan	↓
	Meslier et al. 2020 [92]	Post-omnivorous (higher nonfish meat)	Post-Mediterranean diet (higher fish)	↓

¹Higher abundance (↑), Lower abundance (↓), or comparable abundances (↔) in the higher meat intake group compared to the lower meat intake group.

²Amplicon sequence variant of the genus or species was reported as both enriched and depleted in the comparison by the study author.

³Authors reported that the abundance of the genus differed among the red meat, white meat, and non-meat groups, but did not report the pair-wise difference between groups.