Bacteroidetes / Bacteroidota

Bacteria with identical genetic makeup can exhibit a wide range of traits. This diversity is particularly evident in Bacteroidetes / Bacteroidota, a significant group within the human gut microbiota. These bacteria display various shapes, yet the molecular mechanisms underlying this diversity remain largely unknown
Bornet et al. 2025 Cell Reports 44: 115844

Bacteroidetes is one of the most abundant phyla (∼20% of all Intestine / Gastrointestinal Tract (Gut / GIT) bacteria)
Lee et al. 2022g Journal of Microbiology 60(2) 215-223

Phylum Bacteroidetes comprises aerobic, Anaerobes / Anaerobic organism, non-spore-forming, Gram-negative, Rod-shaped bacteria / Bacilli that colonize the intestine.
Tilg & Kaser 2011
Kim et al. 2017 Immunol Rev. 279(1): 90-105
The Human Microbiome Project Consortium 2012 Nature 486(7402): 207-214
Shah et al. 2021e Int. J. Mol. Sci. 22: 6597

Relative abundance of Bacteroidetes / Bacteroidota in the ecosystem

• Soil: 11.2%


• Plant leaf: 7.0%


• Air: 3.9%


• Ocean: 32.8%


• Freshwater: 10.8%


• Human gut: 65.4%

Shin et al. 2015 Trends Biotechnol 33: 496

The drivers of enterotype 1 (bacteroidetes) seem to derive energy primarily from carbohydrates and proteins through fermentation
Martens et al. 2009 J Biol Chem. 284: 24673-24677

Representatives

Bacteroidetes include Bacteroides, and Prevotella
Antonini et al. 2019 Front. Immunol. 10: 1937

Three known genera belong to the core OTUs (>47% of healthy humans) in the healthy human gut. The three known genera are:
• Bacteroides
• Parabacteroides
• Alistipes
Tap et al. 2009 Environ Microbiol 11: 2574-2584

see also:
B vitamins & Gut microbiota
Bacterial cellular morphologies