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Species/Subspecies: Streptococcus suis
Etymology: Genus name: twisted (like a chain) coccus (coccus means a grain or a berry and referrs to any spherical microorganism)
Species epithet: of a pig
Significance:  [Important]   
Type Strain: S735 = ATCC 43765 = CCUG 7984 = NCTC 10234.
Macromorphology (smell):
Streptococcus suis Streptococcus suis 
Small (about 1 mm in diameter) transluscent colonies after incubation for 24 h at 37°C on blood agar. Gives (greenish), alpha-hemolysis on blood agar. Some strains may have beta-hemolysis (see Fig. 147:1-2 to the left).
Micromorphology: Nonmotile coccoid (< 2 µm in diameter).
Gram +/Gram -:G+
Metabolism: Facultatively anaerobic
Other Enzymes: Esculinase +, hippuricase -, urease -
Biochemical Tests: Voges-Proskauer -
Fermentation of carbohydrates:
Other carbohydrates: amygdalin ?, ribose -
Spec. Char.:
Hosts: Gris
Disease (Swedish):Septikemi, meningit, artrit, bronkopneumoni.
Disease (English):Septicaemia, menigitis, arthritis, bronchopneumonia.
Clinical Picture:
Genome Sequence:
Acc-noStrainSize (bp)Genome
NC_009443 (other seq. available) 98HAH33 2 100 000  

16S rRNA Seq.:
Acc-noStrainNumber of NTOperon
AB002525 (T) 1457 

 Streptococcus suis
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.
Comment:Belongs to Lancefield's group R, S, T or NG (= non-groupable) streptcocci.

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Swedish University of Agricultural Sciences