Veterinary bacteriology: information about important bacteria
|Etymology:||Genus name: named after Sir David Bruce, who first identified the organism, which causes brucellosis. |
Species epithet: of a large sea animal.
|Significance:||Brucella spp. have been isolated from marine mammals. The importance of B. ceti in Sweden is unknown.
[Of minor importance]
|Alternative Species Name(s):||Brucella cetaceae|
|Type Strain:||BCCN 94-74 = NCTC 12891|
|Macromorphology (smell):||Small non-haemolytic shiny and pale honey coloured colonies (0.5-1.0 mm in diameter), which are convex and circular.|
|Micromorphology:||Non-motile coccoid or short rods (0.5-0.7 x 0.6-1.5), which are arranged singly or, less frequently, in pairs, short chains or small groups.|
|Gram +/Gram -:||G-|
|Other Enzymes:||Tryptophanase -, Urease +|
|Biochemical Tests:||H2S -, Voges-Proskauer -|
|Fermentation of carbohydrates:||Most Brucella spp. do not produce acid by fermentation of carbohydrates.|
|Spec. Char.:||Optimal growth temperature: 37°C, but growth occurs between 20 and 40°C.|
|16S rRNA Seq.:|
||About 25 species have been described within genus Brucella and this genus is closely related to genus Bartonella. From a phylogenetic point of view, B. abortus, B. canis, B. ceti, B. melitensis, B. neotome, B. ovis, B. pinnipedialis and B. suis represent the same species (B. melitensis), but due to different host specificities, they have been affiliated with different species.|
|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...