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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
Actinobacteria
Class
Actinobacteria
Order
Corynebacteriales
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-glucoselactosemaltoseL-rhamnosesucrose
+-+?-
L-arabinosecellobioseD-mannitolsalicintrehalose
??v?-
glycerolinulinraffinoseD-sorbitolstarch
?????
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:2020-10-28

News

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...

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