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: | 2023-03-15 |
News |
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New names of bacterial phyla![]() The taxonomic category phylum was previously not regulated by the International Code of Nomenclature of Prokaryotes (ICNP), but now this has changed and it was decided to revise the names of bacterial phyla. All phyla must be written in italics (which has been done on VetBact also before) and have the ending -ota. Published 2023-03-01. Read more... |
The taxonomy of chlamydias Species within the family Chlamydiaceae were previously divided into two genera Chlamydia and Chlamydophila. However, the differences between these two genera were not that great and many research groups have not accepted this division. Therefore, the genus Chlamydophila has been returned to the genus Chlamydia and this change has now been incorporated in VetBact Published 2023-03-15. Read more... |