|Categories:||Motile; notifiable diseases and bacteria|
|Etymology:||Genus name: named after the French bacteriologist A.J.E. Yersin, who in 1894 first isoleted the bacterium which causes the plague.|
Species epithet: named after R.R. Rucker, who studied the red mouth disease and its causative agent.
|Significance:||The disease has been has been found in farmed fish since 1985 in Sweden and recently also in wild fish.
[Of minor importance]
|Type Strain:||ATCC 29473 = CCUG 14190 = NCTC 12986|
|Macromorphology (smell):||Small (0.5-1 mm in diameter) white greyish colonies|
|Micromorphology:||Motile rods (1 x 2-3 µm) with peritrichous flagella|
|Gram +/Gram -:||G-|
|Other Enzymes:||Tryptophanase - and urease -|
|Fermentation of carbohydrates:||Glucose(gas) -, Mannitol +, Rhamnose -, Sorbitol - and Sucrose -. Cf. other Yersinia spp.|
|Vector:||Certain other fish species|
|Disease:||Enteric redmouth (ERM) disease (or just redmouth disease) or yersiniosis
|Hosts:||Freshwater and marine fish, particularly salmonids|
|Clinical Picture:||Subcutaneous hemorrhaging of the mouth, fins, and eyes and also on internal organs.|
|Virulence Factors:||Produce a so-called siderophore (for iron uptake) called ruckerbactin.|
|16S rRNA Seq.:|
||Within the genus Yersinia, 20 species have been described. All species belong to the family Enterobacteriaceae.|
|Comment:||Red mouthe disease is a notifyable disease in Sweden.|
|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...