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Swedish University of Agricultural Sciences

Veterinary bacteriology: information about important bacteria
Veterinary bacteriology


Species/Subspecies: Corynebacterium ulcerans
Categories: Zoonotic; causes hemolysis
Etymology: Genus name: club-shaped bakterium (bacterium means small rod).
Species epithet: causing sore.
Significance:  [Of minor importance]   
Taxonomy:
Phylum
Actinomycetota
Class
Actinomycetia
Order
Mycobacteriales
Family
Corynebacteriaceae 
Genus
Corynebacterium
Type Strain: ATCC 51799 = CCUG 2708 = NCTC 7910.
Macromorphology (smell):
Micromorphology: Non-motile pleomorphic and coccoid rods.
Gram +/Gram -:G+
Metabolism: Aerobic
Catalase/Oxidase:+/-
Other Enzymes: Esculinase -, hippuricase +, urease +.
Biochemical Tests: Methyl red +.
Fermentation of carbohydrates:
D-glucose
+
lactose
-
maltose
+
L-rhamnose
?
sucrose
-
L-arabinose
?
cellobiose
?
D-mannitol
v
salicin
?
trehalose
-
glycerol
?
inulin
?
raffinose
?
D-sorbitol
?
starch
?
Fructose +, mannose ?, xylose -.
Spec. Char.:
Disease:Bovine mastitis.
Abscesses (gangrenous dermatitis) in rodents.
Human pharyngitis.
Hosts: Cattle, rodents, humans
Clinical Picture:
Virulence Factors: Some strains of C. ulcerans are able to produce difteria toxin (see Corynebacterium diphtheria).
Genome Sequence:
Acc-noStrainSize (bp)Genome
AE015925.1 809 2 502 095 1c + 0 

16S rRNA Seq.:
Acc-noStrainNumber of NTOperon
X84256 NCTC 7910T 1490 

Taxonomy/phylogeny:
 
176 species and 13 subspecies are described within the genus Corynebacterium. However, not all names have been approved yet and some species have been affiliated to another genus. The genus Corynebacterium is closely related to the genera Mycobacterium, Nocardia, Rhodococcus and Crossiella.
Comment:C. ulcerans may cause zoonosis.
Updated:2023-03-02

News

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 VetBact

Published 2023-03-15. Read more...

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