Veterinary bacteriology: information about important bacteria
|Etymology:||Genus name: "animals" on red blood cells.|
Species epithet: of pig.
|Alternative Species Name(s):||Mycoplasma suis|
|Type Strain:||Finns ej definierad.|
|Macromorphology (smell):||Cannot be cultivated on artificial media.|
|Micromorphology:||Very small and pleomorphic|
|Gram +/Gram -:||G-, but is normally not gram stained because the cells will then be fragmented.|
|Spec. Char.:||Lacks the cell wall (as other mollicutes) and colonize the surface of erythrocytes.|
|16S rRNA Seq.:|
||About 10 species of mollicutes have been described within the genus Eperythrozoon. Members of this genus was earlier referred to as hemotropic mycoplasmas because they colonize the surface of red blood cells. Now they should be called hemotropic mollicutes because they are not affiliated to the orderMycoplasmatales any longer, but the order Mycoplasmoidales. They are related to mollicutes within the genera Malacoplasmas, Mycoplasmoides and Ureaplasma. It was believed for a long time that the hemotropic mollicutes were rickettsias, but by phylogenetic methods among others, it has been proved that they really are mollicutes.
Note that in the phylogenetic tree (Fig. 42:1) E. felis and E. suis are still called M. haemofelis and M. suis, respectively. Also note that the letter M in the tree can mean Mycoplasma, Mesomycoplasma, Metamycoplasma, Mycoplasmoides or Mycoplasmopsis.
|Comment:||Based on whole genome sequencing, the taxonomy of mycoplasmas has recently undergone a comprehensive revision. The new taxonomy is about to be introduced in VetBact, but it will still be possible to search for the alternative species names. Read more about the revised taxonomy of the mollicutes under the Term list of VetBact and see reference 164 below.|
|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...
|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...