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Swedish University of Agricultural Sciences

Veterinary bacteriology: information about important bacteria
Veterinary bacteriology


Species/Subspecies: Mycoplasma pneumoniae
Categories: Motile; primarily of interest in human medicin
Etymology: Genus name: fungus shaped.
Species epithet: of pneumonia.
Significance:  [Important]   
Taxonomy:
Phylum
Tenericutes
Class
Mollicutes
Order
Mycoplasmatales
Family
Mycoplasmataceae 
Genus
Mycoplasma
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 125 species have been described within the genus Mycoplasma. M. pneumoniae is rather closely related to M. gallisepticum and these mycoplasmas (the M. pneumoniae cluster) are together with the Ureaplasma cluster and the the hemotropic mycoplasmas included in the phylogenetic pneumoniae group. See phylogenetic tree (Fig. 39:1).
Comment:Mycoplasmas are naturally resistant to penicillin (and other beta-lactams). Note that the mycoplasmas have recently been transferred to a new phylum, Tenericutes.
Updated:2020-11-05

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