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Veterinary bacteriology: information about important bacteria
Veterinary bacteriology


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:
Phylum
Spirochaetes
Class
Spirochaetia
Order
Spirochaetales
Family
Spirochaetaceae 
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.:
Acc-noStrainNumber of NTOperon
DQ470655 V1 1467  

Taxonomy/phylogeny:
 
About 25 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:2016-03-18

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The revised taxonomy of mollicutes (mycoplasmas) has now been introduced on VetBact, which means that many of the species have been given new genus names or moved to another higher taxon. 

Published 2021-11-25. Read more...

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