VetBact logo


Swedish University of Agricultural Sciences

Veterinary bacteriology: information about important bacteria
Veterinary bacteriology

Species/Subspecies: Mycoplasmopsis pulmonis
Category: Motile
Etymology: Genus name: similar to mycoplasma (fungus shaped).
Species epithet: of the lung.
Significance:  [Of minor importance]   
Alternative Species Name(s):Mycoplasma pulmonis
Type Strain: PG34 = ATCC 19612 = NCTC 10139.
Macromorphology (smell): Forms small and very typical umbonated colonies ("fried egg appearance"), which can be observed in a microscope.
Micromorphology: Very small and pleomorphic or flask-shaped. This bacterium is motile and can glide on surfaces.
Gram +/Gram -:G-, but is normally not gram stained because the cells will then be fragmented.
Metabolism: Facultatively anaerobic. Energy source: glucose (pH is decreased).
Spec. Char.: Lacks a cell wall.
HostsDiseaseClinical picture
Mouse and ratsMurine respiratory mycoplasmosis (MRM)Lesions such as suppurative (pus forming) rhinitis, otitis media, tracheitis, and bronchopneumonia
RatsGenital infectionPurulent endometritis, salpingitis, and perioophoritis
Genome Sequence:
Acc-noStrainSize (bp)Genome
NC_002771 UAB CTIP 0 963 879 1c + 0 

16S rRNA Seq.:
Acc-noStrainNumber of NTOperon
AF125582 PG34T 1 468 

Mycoplasmopsis is the largest genus among mollicutes of veterinary importance and about 55 species have been described so far within this genus. See the phylogenetic tree (Fig. 33:1) where M 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


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 VetBact

Published 2023-03-15. Read more...

Recently Updated

Recent blog posts

Most recent comment

Swedish University of Agricultural Sciences