Veterinary bacteriology: information about important bacteria
|Etymology:||Genus name: named after the American bacteriologist P. R. Edwards (1901-1966).|
Species epithet: slow (refers to the fact that it is biochemically inactive and can only ferment few carbohydrates).
|Significance:||More common in Asia than in the USA. Has been isolated from farmed and wild eel in Sweden.
[Of minor importance]
|Type Strain:||ATCC 15947 = CCUG 1638 = NCTC 10396.|
|Gram +/Gram -:||G-|
|Other Enzymes:||DNase -, esculinase -, ornithine decarboxylase +, tryptophanase + (cf. E. ictaluri), ureas -.|
|Biochemical Tests:||Citrate -, methyl red +, Voges-Proskauer -, hydrogen sulfide -.|
|Fermentation of carbohydrates:||
All strains ferment glucose under acid production and some of the strains also under gas production.
|Spec. Char.:||Can grow at 42°C (cf. E. ictaluri).|
|Disease:||Edwardsiellosis, septicemia in catfish and eels. "Red disease" of cultured eel.
|Virulence Factors:||Chondroitinase, quorum sensing and siderophore-mediated uptake of iron.|
|16S rRNA Seq.:|
||Four species have been described within the genus Edwardsiella. These bacteria belong to the familyEnterobacteriaceae and they are relatively closely related to bacteria within the genera Morganella and Proteus.|
|New names of bacterial phyla|
The taxonomic category phylum was previously not regulated by the International Code of Nomenclature of Prokaryotes (ICNP), but now this has changed and it was decided to revise the names of bacterial phyla. All phyla must be written in italics (which has been done on VetBact also before) and have the ending -ota.Published 2023-03-01. Read more...
|The taxonomy of chlamydias|
Species within the family Chlamydiaceae were previously divided into two genera Chlamydia and Chlamydophila. However, the differences between these two genera were not that great and many research groups have not accepted this division. Therefore, the genus Chlamydophila has been returned to the genus Chlamydia and this change has now been incorporated in VetBactPublished 2023-03-15. Read more...