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Species/Subspecies: Mycoplasma hyopneumoniae
Etymology: Genus name: fungus shaped.
Species epithet: from pneumonia of a pig.
Significance:  [Very important]   
Type Strain: J = ATCC 25934 = NCTC 10110.
Macromorphology (smell):
Mycoplasma hyopneumoniae 
Forms small and atypical colonies, which lack a clearly defined nipple (no "fried egg appearance") and should be observed in a microscope.
Micromorphology: Non-motile, very small small and pleomorphic
Gram +/Gram -:G-, but is normally not gram stained because the cells will then be fragmented.
Metabolism: Facultatively anaerobic. M. hyopneumoniae is a glucose fermenter, which lowers the pH in the growth medium.
Spec. Char.: Lacks a cell wall.
Hosts: Pig
Disease (Swedish):Lunginflammation (enzootisk pneumoni eller SEP)
Disease (English):Porcine enzootic pneumonia or enzootic pneumonia in pigs (EPP) or swine enzootic pneumonia (SEP).
Clinical Picture: Coughing, poor growth rate and sometimes respiratory distress.
Genome Sequence:
Acc-noStrainSize (bp)Genome
NC_007295 0 897 405 1c + 0 

16S rRNA Seq.:
Acc-noStrainNumber of NTOperon
AE017243 JT 1 537 

 Mycoplasma hyopneumoniae
About 125 species have been described within the genus M. hyopneumoniae is closely related to M. flocculare, M. ovipneumoniae as well as M. dispar and belongs to the M. neurolyticum cluster within the hominis group.
Comment:Note that the mycoplasmas have recently been transferred to a new phylum, Tenericutes.
Reference(s): No. 52

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Swedish University of Agricultural Sciences