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Veterinary bacteriology: information about important bacteria
Veterinary bacteriology


Species/Subspecies: Treponema pallidum subsp. pallidum
Categories: Motile; primarily of interest in human medicin
Etymology: Genus name: A turning thread
Species epithet: Pale, pallid (referrs to the week Gram-staining)
Subspecies epithet: see Species epithet
Significance:T. pallidum subsp. pallidum is globally a very important human pathogen.
  [Very important]   
Taxonomy:
Phylum
Spirochaetes
Class
Spirochaetia
Order
Spirochaetales
Family
Spirochaetaceae 
Genus
Treponema
Type Strain: Not defined
Macromorphology (smell): Cannot be cultivated contiuously in articial media or cell cultures. Is, therfore, propagated intratesicularly in rabbits.
Micromorphology: Tightly coiled (0.1-0.18 x 6-20 µm). Has 2-4 periplasmic flagella at each end of the cell.
Gram +/Gram -:G-
Metabolism: Microaerophilic
Catalase/Oxidase:
Spec. Char.: Generation time: 24-30 h.
Disease:Syphilis, which is a sexually transmitted disease.
Hosts: Human
Clinical Picture:
Genome Sequence:
Acc-noStrainSize (bp)Genome
NC_000919 Nichols 1 138 011 1c + 0 
Three strains have been sequenced. None of the seems to carry plasmids.

16S rRNA Seq.:
Acc-noStrainNumber of NTOperon
M88726 Not defined 1 573 

Taxonomy/phylogeny:
 
About 25 different species have been described within the genus Treponema. T. pallidum consists of two additional subspecies: pertenue and endemicum, which both are human patogens. Some researchers regard all these subspecies as separate species, although they are very closely related from a phylogenetic point of view. See the phylogenetic tree (Fig. 100:1). T. paraluiscuniculi is very closely related to T. pallidum.
Legislation: Syphilis is classified in Sweden as a dangerous disease under the Communicable Diseases Act and shall be notified to the County Medical Officer in the County Council and to the Public Health Agency of Sweden.
Updated:2020-11-05

News

The revised taxonomy of the mollicutes

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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