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Veterinary bacteriology: information about important bacteria
Veterinary bacteriology


Species/Subspecies: Mycoplasma mycoides subsp. mycoides
Category: Notifiable diseases and bacteria
Etymology: Genus name: fungus shaped.
Species epithet: similar to fungi.
Subspecies epithet: see Species epithet.
Significance:CBPP utrotades i de flesta europeiska länder runt år 1900, men sporadiska urbrott har förekommit i framför allt Italien, Portugal och Spanien. Det sista utbrottet rapporterades 1999 från Portugal. Sjukdomen medför idag mycket stora ekonomiska och sociala problem i Afrika.
  [Important]   
Taxonomy:
Phylum
Tenericutes
Class
Mollicutes
Order
Mycoplasmatales
Family
Mycoplasmataceae 
Genus
Mycoplasma
Type Strain: PG1 = NCTC 10114.
Macromorphology (smell):
 
Forms small and very typical umbonated colonies ("fried egg appearance"), which can be observed in a microscope.
Micromorphology: Very small and pleomorphic. Nonmotile.
Gram +/Gram -:G-, but is normally not gram stained because the cells will then be fragmented.
Metabolism: Facultatively anaerobic
Catalase/Oxidase:
Spec. Char.: Lacks a cell wall.
Disease:Contagious bovine pleuropneumonia (CBPP).
Hosts: Cattle, water buffalo and yak.
Clinical Picture: Elevated body temperature, passivity, ruminating ceases, coughing, difficulty in breathing, hunched back and wasting etc.
Virulence Factors: Adhesion proteins, which make it possible for these bacteria to adhere to the host cell and the enzyme L-alpha-glycerophosphate oxidase, which makes it possible for these bacteria to transfer hydrogen peroxide (H2O2) into the host cell. The host cells will then die. Thus, in the presence of oxygen, hydrogen peroxide is formed when the enzyme converts glycerol-3-phosphate to glycerone phosphate.
Genome Sequence:
Acc-noStrainSize (bp)GenomeRef.
NC_005364 PG1T 1 211 703 1c + 0 Nr 85

16S rRNA Seq.:
Acc-noStrainNumber of NTOperonSequence similarityRef.
U26039 PG1T 1 523 99,3% Nr 86

Taxonomy/phylogeny:
 
About 125 species have been described within the genus Mycoplasma. M. mycoides subsp. mycoides belongs to the so-called mycoides group. These mycoplasmas are more closely related to mollicutes within the genus Spiroplasma, which are plant pathogens, than with most other members of the genus . See the phylogenetic tree.
Legislation: CCPP is included in OIE's A-list of major animal diseases. The disease is in Sweden notifyable to the Swedish Board of Agriculture.
Comment:The mollicutes lack a cell wall and have recently been transferred from the phylum Firmicutes to a new phylum, namely Tenericutes. Biotype SC (= M. mycoides subsp. mycoides) is the causative agent of CBPP. Biotype LC has been transferred to the subspecies M. mycoides subsp. capri.
Reference(s): No. 27
Link: Epiwebb - om epizootisjukdomar [in Swedish]
Updated:2021-10-11

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"Dear child has many names" (call it what you will...)

For a long time, Rhodococcus hoagii was refer­red to Rhodo­coccus equi on VetBact, because we experienced some resistance to the name that is now considered to be the correct one, i.e. Rhodococcus hoagii. Now you can find the bacterium in question under the correct name in VetBact, but you can also find the bacterium when searching for the old name. 

Published 2021-10-10. Read more...

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