Veterinary bacteriology: information about important bacteria
|Categories:||Causes hemolysis; motile|
|Etymology:||Genus name: a turning thread |
Species epithet: of the foot, referring to the source of isolation
|Type Strain:||T3552B = DSM 18691 = NCTC 13403|
||After 11 days on FAA plates with 10% blood colonies are 0.5-2.0 mm in diameter, flat, hemolytic with a metallic sheen|
|Micromorphology:||Thin, coiled (0.2-0.3 x 5-16 µm) and motile cells with 4-10 windings. Each cell has six periplasmic flagella where three of the originate from each end and they overlap in the middle of the cell. This used to be referred to as a 3:6:3 flagellation pattern.|
|Gram +/Gram -:||G -|
|Disease:||Digital dermatitis (cattle), ear necrosis and shoulder ulcer (pigs). The bacterium has also been isolated from the gingiva (gums) of pigs.
|Hosts:||Cattle, pigs, sheep|
|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. Some researchers think that e.g. T. pallidum subsp. pallidum and T. pallidum subsp. pertenue should be regarded as different species, although they are very closely related from a phylogenetic point of view. See the phylogenetic tree (Fig. 188:3).|
|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...