VetBact
VetBact logo

VetBact

Swedish University of Agricultural Sciences

Veterinary bacteriology: information about important bacteria
Veterinary bacteriology
Quick search:
 
Advanced search


Species/Subspecies: Streptococcus pneumoniae
Etymology: Genus name: twisted (like a chain) coccus (coccus means a grain or a berry and referrs to any spherical microorganism)
Species epithet: of pneumonia
Significance:  [Primarily in human medicine]   
Taxonomy:
Phylum
Firmicutes
Class
Bacilli
Order
Lactobacillales
Family
Streptococcaceae 
Genus
Streptococcus
Type Strain: ATCC 33400 = CCUG 28588 = NCTC 7465.
Macromorphology (smell): Small colonies (0.5-1 mm in diameter) after incubation for 24 h at 37°C on blood agar. Strong alpha-hemolysis (greenish) on blood agar under aerobic cultivation.
Micromorphology: Nonmotile cocci (0.5-1.25 microns in diameter) in pairs or in short chains.
Gram +/Gram -:G+
Metabolism: Facultatively anaerobic
Catalase/Oxidase:-/
Other Enzymes: Esculinase v, hippuricase -, urease -
Biochemical Tests: Voges-Proskauer -
Fermentation of carbohydrates:
D-glucoselactosemaltoseL-rhamnosesucrose
+++?+
L-arabinosecellobioseD-mannitolsalicintrehalose
+?vvv
glycerolinulinraffinoseD-sorbitolstarch
+++-v
Other carbohydrates: amygdalin -, ribose -
Spec. Char.: Can grow from 25°C to 42°C.
S. pneumoniae can form polysaccharide capsules of about 100 different serotypes.
Hosts: Man, primates and rodents
Disease:Septicaemia, pneumonia, meningitis
Clinical Picture:
Virulence Factors: Invasins (pneumolysin), capsule, etc.
Genome Sequence:
Acc-noStrainSize (bp)Genome
NC_008533 D39 2 046 115 1c + 0 

16S rRNA Seq.:
Acc-noStrainNumber of NTOperon
AF003930 (T) 1515 

Taxonomy/phylogeny:
Streptococcus pneumoniae  
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 NG (= non-groupable) streptcocci.
Updated:2020-04-09

Recently Updated

Recent blog posts


Swedish University of Agricultural Sciences