Veterinary bacteriology: information about important bacteria
|Categories:||Causes hemolysis; motile|
|Etymology:||Genus name: A turning thread |
Species epithet: from a cancerous wound
Subspecies epithet: from a cow
|Type Strain:||Not defined|
||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 -:|
|Disease:||Is assumed to contribute to the development of digital dermatitis in cattle
|16S rRNA Seq.:|
||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.|
|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 VetBactPublished 2023-03-15. Read more...