Bacteroides †,

Bacteroidetes
Bacteroidia
Bacteroidales
Bacteroidaceae
Yuli Song

Yuli Song

8700 Mason Montgomery Road, MBC DV2-5K1, 533; Mason, OH, 45040-9462 USA

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Chengxu Liu

Chengxu Liu

11511 Reed Hartman Hwy, Cincinnati, OH, 45241 USA

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Sydney M. Finegold

Sydney M. Finegold

VA Medical Center West Los Angeles, Infectious Diseases Section (111 F), Los Angeles, CA, 90073 USA

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First published: 14 September 2015
Citations: 11
Castellani and Chalmers 1919, 959AL emend. Shah and Collins 1989, 85
Published by John Wiley & Sons, Inc., in association with Bergey's Manual Trust.

Abstract

Bac.te.ro.i'des. N.L. n. bacter rod; L. suff. -oides (from Gr. suff. -eides, from Gr. n. eidos that which is seen, form, shape, figure), resembling, similar; N.L. masc. n. Bacteroides rodlike.

Bacteroidetes / Bacteroidia / Bacteroidales / Bacteroidaceae / Bacteroides

Rod-shaped cells with rounded ends. Gram-stain-negative. Cells are fairly uniform if smears are prepared from young cultures on blood agar. Nonmotile. Anaerobic. Colonies are 1–3 mm in diameter, smooth, white to gray, and nonhemolytic on blood agar. Chemo-organotrophic. Saccharolytic. Weakly proteolytic. Most species grow in the presence of 20% bile, but are not always stimulated. Esculin is usually hydrolyzed. Nitrate is not reduced to nitrite. Indole variable. Major fermentation products are succinate and acetate. Trace to moderate amounts of isobutyrate and isovalerate may be produced. Predominant cellular fatty acid is C 15:0 anteiso.

DNA G+C content (mol%): 39–49.

Type species: Bacteroides fragilis (Veillon and Zuber 1898) Castellani and Chalmers 1919, 959AL.

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