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Veterinary bacteriology: information about important bacteria
Veterinary bacteriology

Species/Subspecies: Mycoplasmopsis meleagridis
Category: Notifiable diseases and bacteria
Etymology: Genus name: similar to mycoplasma (fungus shaped).
Species epithet: from a turkey.
Significance:  [Important]   
Alternative Species Name(s):Mycoplama meleagridis
Type Strain: 17529 = ATCC 25294 = NCTC 10153.
Macromorphology (smell): Forms small colonies, which are not always umbonated ("fried egg appearance"). The macro morphology can be observed in a microscope.
Micromorphology: Small coccoid cells.
Gram +/Gram -:G-, but is normally not gram stained because the cells will then be fragmented.
Metabolism: Fakulatively anaerobic.Energy source: arginine (pH is increased).
Fermentation of carbohydrates: Glucose -
Spec. Char.: Lacks a cell wall.
Disease:The disease is transmitted mainly through vertical spread of infection from breeding animals and symptoms are seen mainly among turkey poultries.
HostsDiseaseClinical picture
TurkeysAirsacculitis, which is vertically transmitted via eggs.Increased breathing frequency (Tachypnoea), nasal discharge and sneezing.
TurkeysReproductive disorders.Reduced hatchability and embryo mortality.
TurkeysSkeletal deformities (osteodystrophy).Lameness, swelling, crooked necks and decreased growth rate.
Genome Sequence:
Acc-noStrainSize (bp)GenomeRef.
JZXN01000000 ATCC 25294T 0 634 182  Nr 173

16S rRNA Seq.:
Acc-noStrainNumber of NTOperon
L24106 175291437  

Mycoplasmopsis is the largest genus among mollicutes of veterinary importance and about 55 species have been described so far within this genus. M. meleagridis is closely related to M. agalactiae and M. bovis. See the phylogenetic tree (Fig. 215:1) where M can mean Mycoplasma, Mesomycoplasma, Metamycoplasma, Mycoplasmoides or Mycoplasmopsis.
Legislation: Avian mycoplasmosis caused by M. meleagridis is notifyable to the Swedish Board of Agriculture in Sweden
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


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Published 2023-03-01. Read more...
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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...

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