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Veterinary bacteriology: information about important bacteria
Veterinary bacteriology


Species/Subspecies: Streptococcus suis
Categories: Zoonotic; causes hemolysis
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]   
Taxonomy:
Phylum
Firmicutes
Class
Bacilli
Order
Lactobacillales
Family
Streptococcaceae 
Genus
Streptococcus
Type Strain: S735 = ATCC 43765 = CCUG 7984 = NCTC 10234.
Macromorphology (smell):
   
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
Catalase/Oxidase:-/?
Other Enzymes: Esculinase +, hippuricase -, urease -
Biochemical Tests: Voges-Proskauer -
Fermentation of carbohydrates:
D-glucoselactosemaltoseL-rhamnosesucrose
+++?+
L-arabinosecellobioseD-mannitolsalicintrehalose
-?-++
glycerolinulinraffinoseD-sorbitolstarch
-+v-?
Other carbohydrates: amygdalin ?, ribose -
Spec. Char.:
Disease:
 
HostsDiseaseClinical picture
PigsSepticemia, meningitis, artritis, pneumoniaFever, lameness, swollen joints, instability to stand, sepsis, recent death, most common after weaning. Natural habitat upper respiratory tract
HumansMeningitis, septicaemia, endocarditis, deafnessMeningitis, fever, vomiting. Transmitted by wounds and insufficient heated food
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 

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.
Comment:Belongs to Lancefield's group R, S, T or NG (= non-groupable) streptcocci.
Updated:2021-10-04

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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