Bacteroidetes, Ruminococcus gnavus, and Fusobacterium were increased in patients with GAD compared with controls, while Faecalibacterium, Eubacterium rectale
, Sutterella, Lachnospira, and Butyricicoccus were increased in healthy controls.
The animal-based diet increased the abundance of bile-tolerant microorganisms (Alistipes, Bilophila and Bacteroides) and decreased the levels of Firmicutes that metabolize dietary plant polysaccharides (Roseburia, Eubacterium rectale
and Ruminococcus bromii).
Roseburia eubacterium rectale
became the predominant species.
 reported that diet containing polyphenols (e.g., +catechin) increased the growth of the Clostridium coccoides, Eubacterium rectale
, Bifidobacterium spp., and Escherichia coli, but significantly decreased the growth of the Clostridium histolyticum group.
Bacteria 1% Selenomonas sputigena ATCC 35185 Bacteria 1% Eubacterium rectale
M104/1 Bacteria 1% Eubacterium siraeum V10Sc8a Bacteria 1% others Bacteria 32% others Eukaryota 1% Note: Table made from pie chart.
The finely ground almonds significantly increased the populations of bifidobacteria and Eubacterium rectale
, resulting in a higher prebiotic index (4.43) than was found for the commercial prebiotic fructooligosaccharides (4.08) at 24 h of incubation.
We found that finely ground almonds significantly increased the population of bifidobacteria and Eubacterium rectale
, resulting in a higher prebiotic index (4.43) compared with the commercial prebiotic fructo-oligosaccharides (4.08) at 24 hour incubation, although no significant differences in the proportions of gut bacteria groups were detected in response to defatted finely ground almonds."
One study found a plant-based diet, which leads to an increase in the population of Firmicutes (Roseburia, Ruminococcus bromii, and Eubacterium rectale
) and the transition to a meat-based diet leads to an increase in the number of Alistipes, Bilophila, and Bacteroides .