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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:2021-12-02

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The revised taxonomy of the mollicutes

The revised taxonomy of mollicutes (mycoplasmas) has now been introduced on VetBact, which means that many of the species have been given new genus names or moved to another higher taxon. 

Published 2021-11-25. Read more...

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