Veterinary bacteriology: information about important bacteria
|Etymology:||Genus name: between other mycoplasmas (fungus shaped).|
Species epithet: different.
|Significance:||[Of minor importance]|
|Alternative Species Name(s):||Mycoplasma dispar|
|Type Strain:||462/2 = ATCC 27140 = NTCC 10125|
|Macromorphology (smell):||Forms small and atypical colonies, which are not umbonated (no "fried egg appearance") and should be observed in a microscope.|
|Micromorphology:||The small cells are coccoid or short filamentous.|
|Gram +/Gram -:||G-, but is normally not gram stained because the cells will then be fragmented.|
|Metabolism:||Facultatively anaerobic. M. dispar is a glucose fermenter, which lowers the pH in the growth medium.|
|Disease:||Pneumonia and sometimes mastitis.
|Virulence Factors:||Can produce hydrogen peroxide (H2O2) and biofilm.|
|16S rRNA Seq.:|
||About 15 species have been described within the genus Mesomycoplasma. Mesomycoplasma dispar is closely related to M. ovipneumoniae, M. hyopneumoniae as well as M. flocculare.
Note that the letter M in the phylogenetic tree (Fig. 230:1) 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 has now been 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 also reference 164 below.|
|Reference(s):||No. 164, 168|
|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...