Species/Subspecies: | Bacteroides fragilis | ||||||||
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Etymology: | Genus name: rod-shaped Species epithet: fragile (has very fragile colonies under certain conditions) | ||||||||
Significance: | [Important] | ||||||||
Taxonomy: | Class Bacteroidia Order Bacteroidales Family Bacteroidaceae Genus Bacteroides |
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Type Strain: | ATCC 25285 = CCUG 4856 = NCTC 9343 | ||||||||
Macromorphology (smell): | Small, circular and transluscent colonies (1-3 mm in diameter). Can in rare cases give hemolysis on blood agar. | ||||||||
Micromorphology: | Rod shaped and nonmotile cells (0.6 x 1.5-4.5 µm), which appear singly or in pairs. Have rounded ends. | ||||||||
Gram +/Gram -: | G- | ||||||||
Metabolism: | Anaerobic, but aerotolerant. | ||||||||
Catalase/Oxidase: | +/? | ||||||||
Other Enzymes: | Tryptophanase - | ||||||||
Fermentation of carbohydrates: | Arabinose -, glucose +, lactose +, maltoe +, rhamnose -, salicin -, sucose +, trehalose - | ||||||||
Spec. Char.: | |||||||||
Disease: | Abscesses in different organs, diarrhea |
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Hosts: | Cattle, horses, pigs, sheep, cats, dogs, humans | ||||||||
Clinical Picture: | |||||||||
Genome Sequence: |
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16S rRNA Seq.: |
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Taxonomy/phylogeny:
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About 45 species have been described within genus Bacteroides. Many species, which were earlier affiliated with genus Bacteroides, have now been transfered to genus Porphyromonas or genus Prevotella. These three genera are related and belong to the order Bacteroidales. | ||||||||
Updated: | 2016-03-06 |
News |
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New families introduced within the order Enterobacterales![]() The order Enterobacterales (formerly called Enterobacteriales) previously consisted of bacteria with different properties and phylogenetically, these bacteria were far apart. In order for the taxonomy to be more in line with phylogeny, some of these bacteria have, therefore, been sorted into 6 new families. Published 2022-04-13. Read more... |