| Basic Characteristics | Properties (Bacteroides fragilis) |
| Capsule | Positive (+ve) |
| Catalase | Positive (+ve) |
| Flagella | Negative (-ve) |
| Gelatin Hydrolysis | Weakly Positive (+ve) |
| Gram Staining | Gram-negative (-ve) |
| Growth in Bile (20%) | Positive (+ve) |
| Hemolysis | Negative (-ve) |
| Indole | Variable |
| Motility | Negative (-ve) |
| Nitrate Reduction | Negative (-ve) |
| Oxidase | Variable |
| Pigment | Negative (-ve) |
| Shape | Rod-shaped cells with rounded ends. |
| Spore | Negative (-ve) |
| Thioglycolate with bile | Positive (+ve) |
| Urease | Negative (-ve) |
Fermentation of |
|
| Arabinose | Negative (-ve) |
| Cellobiose | Variable |
| Glucose | Positive(+ve) |
| Glycogen | Positive(+ve) |
| Inositol | Negative (-ve) |
| Lactose | Positive(+ve) |
| Maltose | Positive(+ve) |
| Mannitol | Negative (-ve) |
| Mannose | Positive(+ve) |
| Melibiose | Weakly Positive (+ve) |
| Raffinose | Positive(+ve) |
| Rhamnose | Negative (-ve) |
| Ribose | Negative (-ve) |
| Salicin | Negative (-ve) |
| Starch | Positive (+ve) |
| Sucrose | Positive (+ve) |
| Trehalose | Negative (-ve) |
| Xylan | Negative (-ve) |
| Xylose | Positive (+ve) |
Enzymatic Reactions |
|
| Alanine arylamidase | Positive (+ve) |
| Esculin Hydrolysis | Positive (+ve) |
| Glutamic acid decarboxylase | Positive (+ve) |
| Glycine arylamidase | Negative (-ve) |
| Leucine arylamidase | Positive (+ve) |
| Leucyl glycine arylamidase | Positive (+ve) |
| N-Acety1- b-glucosaminidase | Positive (+ve) |
| ONPG (β-galactosidase) | Positive (+ve) |
References
- Editors: Krieg, N.R., Ludwig, W., Whitman, W., Hedlund, B.P., Paster, B.J., Staley, J.T., Ward, N., Brown, D., Parte, A. (2010). Bergey’s Manual of Systematic Bacteriology. Volume 4: The Bacteroidetes, Spirochaetes, Tenericutes (Mollicutes), Acidobacteria, Fibrobacteres, Fusobacteria, Dictyoglomi, Gemmatimonadetes, Lentisphaerae, Verrucomicrobia, Chlamydiae, and Planctomycetes.
- http://www.onlinebiologynotes.com/bacteroides-general-characteristics-classification-pathogenesis-clinical-manifestations-lab-diagnosis-biochemical-testscharacteristicsculture-characteristics-treatment/
- https://www.microbiologyresearch.org/docserver/fulltext/jmm/13/1/medmicro-1369.pdf
- http://www.vetbact.org/?artid=102
- https://www.sciencedirect.com/topics/immunology-and microbiology/bacteroides-fragilis
- Draper, D. L., & Barry, A. L. (1977). Rapid identification of Bacteroides fragilis with bile and antibiotic disks. Journal of clinical microbiology, 5(4), 439-43.
- https://watermark.silverchair.com/23-Supplement_1-S66.pdf
- https://catalog.hardydiagnostics.com/cp_prod/Content/hugo/Bacteriodes.htm
