Bacteroides

Bacteroides
Bacteroides spp. anaerobically cultured in blood agar medium.
Scientific classification
Kingdom:	Bacteria
Phylum:	Bacteroidetes
Order:	Bacteroidales
Family:	Bacteroidaceae
Genus:	Bacteroides Castellani & Chalmers 1919
Species
B. acidifaciens B. distasonis B. gracilis B. fragilis B. oris B. ovatus B. putredinis B. pyogenes B. stercoris B. suis B. tectus B. thetaiotaomicron B. vulgatus etc.

Bacteroides is a genus of Gram-negative bacteria. Bacteroides species are non-endospore-forming, anaerobes, and may be either motile or non-motile, depending on the species. The DNA base composition is 40-48% GC. Unusual in bacterial organisms, Bacteroides membranes contain sphingolipids. They also contain meso-diaminopimelic acid in their peptidoglycan layer.