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Veterinary bacteriology: information about important bacteria
Veterinary bacteriology


Species/Subspecies: Acholeplasma laidlawii
Etymology: Genus name: suggests lack of a requirement for cholesterol.
Species epithet: named after the Brittish virologist Patrick Laidlaw (1881-1940), who first isolated this organism.
Significance:Of no direct importance for veterinary medicine
  [Of minor importance]   
Taxonomy:
Phylum
Tenericutes
Class
Mollicutes
Order
Acholeplasmatales
Family
Acholeplasmataceae 
Genus
Acholeplasma
Type Strain: PG-8 = ATCC 23206 = NCTC 10116
Macromorphology (smell):
 
Small colonies (0.2-2 mm), with a shape resembling a fried egg
Micromorphology: Small, pleomorphic and nonmotile organisms (0.2-0.5 µm in diameter).
Gram +/Gram -:G-, but is normally not gram stained since the cells are fragile and fragmented by this staining method.
Metabolism: Facultatively anaerobic
Catalase/Oxidase:?/-
Other Enzymes: Arginine -, urease -
Fermentation of carbohydrates: Glucose +
Spec. Char.: Lacks a cell wall. Temperature optimum: 37°C, but grows at 20-41°C
Disease:Probably non-pathogenic
Hosts: Has been isolated from manure, soil, plants, insects and many different mammalian species
Clinical Picture:
Genome Sequence:
Acc-noStrainSize (bp)Genome
NC_010163 PG-8A 1 496 992 1c + 0 

16S rRNA Seq.:
Acc-noStrainNumber of NTOperon
U14905 PG8 1 476 

Taxonomy/phylogeny:
 
About 20 species have been described within the genus Acholeplasma, but all species names have not yet been aproved. This genus is closely related to a group of plant pathogens, which used to be called phytoplasmas. It has not been possible to cultivate these bacteria and this genus should, therefore, be called: "Candidatus Phytoplasma".
Comment: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 for some mycoplasmas the names have not changed and this applies to members of the genus Acholeplasma.

Sometimes found as a contaminant of cell cultures.

Updated:2021-12-02

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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