|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.|
|Hosts:||Freshwater and marine fish, particularly salmonids|
|Vector:||Certain other fish species|
|Disease:||Enteric redmouth (ERM) disease (or just redmouth disease) or yersiniosis|
|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.|