|Categories:||Causes hemolysis; in the normal flora; 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.|
|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...