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Veterinary bacteriology: information about important bacteria
Veterinary bacteriology


Species/Subspecies: Mesomycoplasma dispar
Etymology: Genus name: between other mycoplasmas (fungus shaped).
Species epithet: different.
Significance:  [Of minor importance]   
Taxonomy:
Phylum
Tenericutes
Class
Mollicutes
Order
Mycoplasmoidales
Family
Metamycoplasmataceae 
Genus
Mesomycoplasma
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.
Catalase/Oxidase:
Spec. Char.:
Disease:Pneumonia and sometimes mastitis.
Hosts: Cattle.
Clinical Picture:
16S rRNA Seq.:
Acc-noStrainNumber of NTOperon
AF412979 462/2T 1475  

Taxonomy/phylogeny:
 
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 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 also reference 164 below.
Reference(s): No. 164
Updated:2021-11-18

News

The revised taxonomy of the mollicutes

The revised taxonomy of mollicutes (mycoplasmas) has now been introduced on VetBact, which means that many of the species have been given new genus names or moved to another higher taxon. 

Published 2021-11-25. Read more...

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