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Swedish University of Agricultural Sciences

Veterinary bacteriology: information about important bacteria
Veterinary bacteriology


Species/Subspecies: Streptococcus dysgalactiae subsp. equisimilis
Category: Causes hemolysis
Etymology: Genus name: twisted (like a chain) cocci (coccus means a grain or a berry and referrs to any spherical microorganism)
Species epithet: from loss of lactation
Subspecies epithet: resembling Streptococcus equi.
Significance:  [Very important]   
Alternative Species Name(s):S. equisimilis
Taxonomy:
Phylum
Firmicutes
Class
Bacilli
Order
Lactobacillales
Family
Streptococcaceae 
Genus
Streptococcus
Type Strain: CCUG 36637 and 36913
Macromorphology (smell):
   
Small (about 1 mm in diameter) transluscent colonies after incubation for 24 h at 37°C on blood agar. Give (clear) beta-hemolysis on bovine blood agar.
Micromorphology: Nonmotile cocci in chains
Gram +/Gram -:G+
Metabolism: Facultatively anaerobic
Catalase/Oxidase:-/-
Other Enzymes: Esculinase v, hippurikcase v
Biochemical Tests: Voges-Proskauer -
Fermentation of carbohydrates:
D-glucoselactosemaltoseL-rhamnosesucrose
+v+?+
L-arabinosecellobioseD-mannitolsalicintrehalose
-?-?+
glycerolinulinraffinoseD-sorbitolstarch
v---+
Other carbohydrates: Amygdalin ?, ribose +.
Spec. Char.:
Special Media:
Streptococcus dysgalactiae  
Disease:Abscesses, endometritis, mastitis
Hosts: Horse, pig
Clinical Picture:
Genome Sequence:
Acc-noStrainSize (bp)Genome
NC_012891 GGS_124 2 106 340 1l + 0 

16S rRNA Seq.:
Acc-noStrainNumber of NTOperon
AJ319643 ATCC 35666 1 458 

Taxonomy/phylogeny:
 
About 100 species have been described within the genus Streptococcus. Many species within the genus Enterococcus have earlier been classified as streptococci and, thus, they are closely related. S. dysgalactiae is closely related to S. agalactiae.
Comment:Belongs to Lancefield's group A, C, G or L streptcocci.
Updated:2017-11-09

News

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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