Veterinary bacteriology: information about important bacteria
|Species/Subspecies:||Francisella tularensis subsp. holarctica|
|Categories:||Zoonotic; notifiable diseases and bacteria|
|Etymology:||Genus name: named after the American bacteriologist Edward Francis, who has studied tularemia.|
Species epithet: refers to Tulare county in California, where the disease was first described in rodents in year 1912.
Subspecies epithet: may be found in all arctic regions.
|Significance:||Is predominantly found in Asia and Europe, but occasionally also in North America. This subspecies is less virulent than subsp. tularensis.
|Type Strain:||GIEM 503.|
|Micromorphology:||Coccoid or short nonmotile rods.|
|Gram +/Gram -:||G-|
|Other Enzymes:||Tryptophanase - (= indole -), ureas -.|
|Spec. Char.:||Facultatively intracellular. May penetrate intact skin.|
|Vector:||Mosquitoes and ticks|
|Virulence Factors:||The capsule can be a virulence factor.|
|16S rRNA Seq.:|
||Nine species have been described within genus Francisella and this genus is related to Coxiella spp. and Legionella spp.|
|Legislation:||Tularemia is notifiable in Sweden. Francisella tularensis belongs to category A as a potential bioterrorism agent according to NIAID.|
|Comment:||Common in Sweden. The subspecies holarctica is less virulent than the subspecies tularensis.|
|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...