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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

New families introduced within the order Enterobacterales
Phylogenetic tree for the order <i>Enterobacteriales</i>.

The order Enterobacterales (formerly called Enterobacteriales) previously consisted of bacteria with different properties and phylogenetically, these bacteria were far apart. In order for the taxonomy to be more in line with phylogeny, some of these bacteria have, therefore, been sorted into 6 new families.

Published 2022-04-13. Read more...

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