|Categories:||Causes hemolysis; spore forming; motile; notifiable diseases and bacteria|
|Etymology:||Genus name: a small spindle. |
Species epithet: named after the French bacteriologist J.A.B. Chauveau (1827-1917).
|Significance:||In Sweden, blackleg is endemic in primarely the south eastern counties.
|Type Strain:||ATCC 10092 = NCTC 13023.|
||May form large (5 mm in diameter) colonies, but may also form a continuous "carpet" of bacteria, (the bacteria are swarming). Give hemolysis on sheep blood agar.|
|Micromorphology:||Big straight rods (0.6 x 3-8 µm) with rounded ends, which appear single or in short chains of 3-5 bacteria. B. chauvoei is spore forming and usually motile by means of peritrichous flagella.|
|Gram +/Gram -:||G+|
|Other Enzymes:||DNase +, esculinase +, hyaluronidase +, lecithinase -, neuraminidase +, tryptophanase -.|
|Fermentation of carbohydrates:||
|Virulence Factors:||The toxin CctA (Clostridium chauvoei toxin A), which is a β-barrel pore forming toxin of the leucocidin family is a major virulence factor of C. chauvoei. These proteins are cytotoxic, because they create unregulated pores in the membrane of target cells. Note that CctA is responsible for the strong hemolytic activity seen on blood-agar plates. Other virulence factors are DNase and hyaluronidase, which are named β- and γ-toxin, respectively.|
|16S rRNA Seq.:|
||About 180 differens species have been descibed within genus Clostridium. C. chauvoei is closely related toC. septicum.|
|Legislation:||In Sweden it is compulsary to report blackleg to the Swedish Board of Agriculture.|
|Reference(s):||No. 10, 113|
|New names of taxa within the classification category phylum|
During October 2021, an article was published by A. Oren och G.M. Garrity, in which new names are proposed for a number of taxa within the classification category phylum. This has resulted in many discussions in social media about whether it was really necessary to make these changes, which have created confusion among microbiologists and other professionals who come into contact with bacteriology.Published 2022-09-28. Read more...