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Swedish University of Agricultural Sciences

Veterinary bacteriology: information about important bacteria
Veterinary bacteriology


Species/Subspecies: Helcococcus ovis
Category: Causes hemolysis
Etymology: Genus name: Helkos, wound; Cocci (grains or berries). Helcococcus, a coccus found in wounds.
Significance:  [Of minor importance]   
Taxonomy:
Phylum
Firmicutes
Class
Clostridia
Order
Eubacteriales
Family
Peptoniphilaceae 
Genus
Helcococcus
Type Strain: S840-96-1 = ATCC BAA-59 = CCUG 37441.
Macromorphology (smell):
   
Small pinhead, non-pigmented, colonies. No hemolysis on blood agar.
Micromorphology: Gram-positive cocci, which occur singly, in pairs or short chains.
Gram +/Gram -:G+
Metabolism: Facultatively anaerobic
Catalase/Oxidase:-/-
Other Enzymes: Aesculinase -, urease -
Fermentation of carbohydrates:
D-glucoselactosemaltoseL-rhamnosesucrose
+-+?-
L-arabinosecellobioseD-mannitolsalicintrehalose
-?-??
glycerolinulinraffinoseD-sorbitolstarch
?----
Thus, acid is produced from glucose, but not under gas production.
Spec. Char.:
Disease:
 
HostsDiseaseClinical picture
CattleEndocarditisValvular endocaritits
CattleMastitis, subclinicalOccurs mostly in association with other udder pathogens such as Trueperella pyogenes
Horses and ruminantsLungabscessesSeveral abscesses with green-yellow purulent to caseous material, spread in the lung parenchyma as well as pleural adhesions
Calves and lambArhtritisPolyarthritis with green-yellow purulent to caseous material
16S rRNA Seq.:
Acc-noStrainNumber of NTOperon
Y16279 CCUG 37441T 1423  

Taxonomy/phylogeny:
Reference(s): No. 162, 163
Updated:2021-06-13

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