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Swedish University of Agricultural Sciences

Veterinary bacteriology: information about important bacteria
Veterinary bacteriology


Species/Subspecies: Mycoplasmoides pneumoniae
Categories: Motile; primarily of interest in human medicin
Etymology: Genus name: similar to mycoplasma (fungus shaped).
Species epithet: of pneumonia.
Significance:  [Important]   
Alternative Species Name(s):Mycoplasma pneumoniae
Taxonomy:
Phylum
Tenericutes
Class
Mollicutes
Order
Mycoplasmoidales
Family
Mycoplasmoidaceae 
Genus
Mycoplasmoides
Type Strain: FH = ATCC 15531 = NCTC 10119.
Macromorphology (smell): Forms small and very typical umbonated colonies ("fried egg appearance"), which can be observed in a microscope.
Micromorphology: Very small and flask shaped or pleomorphic. 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: Striktly aerobic (cf. other mycoplasmas). Energy source: glucose (pH is increased).
Catalase/Oxidase:?/-
Spec. Char.: Lacks a cell wall. Optimal growth temperature: 37°C.
Disease:Atypical pneumonia
Hosts: Människa
Clinical Picture: Mild to severe with fever and prolonged dry coughing
Genome Sequence:
Acc-noStrainSize (bp)Genome
NC_000912 M129 0 816 394 1c + 0 

16S rRNA Seq.:
Acc-noStrainNumber of NTOperon
M29061 (T) 1465 

Taxonomy/phylogeny:
 
About 10 species have been described within the genus Mycoplasmoides. M. pneumoniae is rather closely related to M. gallisepticum. See the phylogenetic tree (Fig. 39:1) where M can mean Mycoplasma, Mesomycoplasma, Metamycoplasma, Mycoplasmoides or Mycoplasmopsis.
Comment:Mycoplasmas are naturally resistant to penicillin (and other beta-lactams).

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:2021-11-25

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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