Veterinary bacteriology: information about important bacteria
|Categories:||Zoonotic; motile; notifiable diseases and bacteria|
|Etymology:||Genus name: thin helix (coil). |
Species epithet: interrogation (refers to the shape resembling a question mark).
|Significance:||Leptospirosis is said to be the most wide spread zoonotic infection in Nature.
|Type Strain:||Serovar Icterohaemorrhagiae, RGA = ATCC 23581.|
|Micromorphology:||"Sewing thread thin" (0.1 x 6-12 µm), helical and with a hook on each end. Motile and has two periplasmic flagella.|
|Gram +/Gram -:||G-|
|Fermentation of carbohydrates:||Does not ferment karbohydrates.|
|Spec. Char.:||Generation time: 6-8 h. Optimal growth temperature: 28-30°C.|
|Disease:||Leptospirosis, which is a zoonosis.
|Hosts:||Dog, cattle and pig etc. as well as humans.|
|Clinical Picture:||Fever, renal and hepatic insufficiency as well as pulmonary manifestations and reproductive failure.|
|16S rRNA Seq.:|
||About 25 different species have been described within the genus Leptispira. L. interrogans is closely related to L. kirschneri. See the phylogenetic tree (Fig. 116:1).|
|Legislation:||Leptospirosis is notifyable in Sweden|
|Comment:||There are 23 different serogroups, which in turn are divided into about 250 different serovars. Icterohaemorrhagiae and Bratislava are important serovars. From a clinical point of view, the serovar is more important than the species as pathogenicity is associated with serovar, rather than species and different species may belong to the same serovar.|
|Reference(s):||No. 6, 36, 41, 109, 139|
|Link:||The Leptospirosis Information Center|
|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...