| Species/Subspecies: | Treponema phagedenis | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Categories: | Causes hemolysis; motile | ||||||||
| Etymology: | Genus name: A turning thread Species epithet: from a cancerous wound Subspecies epithet: from a cow | ||||||||
| Significance: | [Important] | ||||||||
| Taxonomy: | Class Spirochaetia Order Spirochaetales Family Treponemataceae Genus Treponema |
||||||||
| Type Strain: | Not defined | ||||||||
| Macromorphology (smell):
| |||||||||
| Micromorphology:
| Tightly coiled and motile. Length: 10-15 µm, diameter: 0,35-0,40 µm and 7-9 perplasmic flagella (= endoflagella or axial filaments). | ||||||||
| Gram +/Gram -: | |||||||||
| Catalase/Oxidase: | |||||||||
| Spec. Char.: | |||||||||
| Disease: | Is assumed to contribute to the development of digital dermatitis in cattle |
||||||||
| Hosts: | Cattle | ||||||||
| Clinical Picture: | |||||||||
| 16S rRNA Seq.: |
| ||||||||
| Taxonomy/phylogeny:
|
About 30 different species have been described within the genus Treponema. There are different opinions among researchers about which should be regarded as separate species or only as subspecies of a certain species. T. phagedenis subsp. vaccae is closely related to Treponema phagedenis subsp. phagedenis and some researchers regard them as a single species. See the phylogenetic tree (Fig. 139:2). | ||||||||
| Comment: | Note that the species name has not yet been officially approved. The organism should, therefore, be called Treponema sp. or "Treponema phagedenis subsp. vaccae" for the moment. The organism has also been named "Treponema bovis". Other bacteria are possibly also needed for development of the disease. | ||||||||
| Reference(s): | No. 60 | ||||||||
| Updated: | 2023-03-08 |