MetagenomeSeq revealed differences in certain bacteria between vegetarians and omnivores after bowel cleansing. MetagenomeSeq identified the relative abundances of fecal bacterial genus levels in vegetarians (Veg) and omnivores (Omn) (A), including Gordonibacter, Anaerostipes, Butyricicoccus, and ventriosum_group. The analysis also identified genera that were higher in Omn than Veg (B), including Bilophila, Phascolarctobacterium, Tyzzerella, Ruminiclostridium_9, and Negativibacillus. Adjusted P values are expressed as q values.