Streptococcus: Difference between revisions

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Streptococcus
m (Aidan moved page Streptococcus to Streptococcus species without leaving a redirect)
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= Streptococcus =
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= Microbiology =
 
== Classification ==
 
   
 
* Catalase-negative Gram positive cocci in pairs or chains
 
* Catalase-negative Gram positive cocci in pairs or chains
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** Lancefield antigen group (A-H)
 
** Lancefield antigen group (A-H)
   
== Species ==
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= Species =
   
 
* Alpha-hemolytic
 
* Alpha-hemolytic
** ''S. pneumoniae'' (usually in pairs)
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** ''[[Streptococcus pneumoniae|S. pneumoniae]]'' (usually in pairs)
** Viridans group streptococci
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** [[Viridans group streptococci]]
 
*** ''S. mitis''
 
*** ''S. mitis''
 
*** ''S. oralis''
 
*** ''S. oralis''
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**** ''S. intermedius''
 
**** ''S. intermedius''
 
* Beta-hemolytic
 
* Beta-hemolytic
** Group A: ''S. pyogenes''
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** Group A: ''[[Streptococcus pyogenes|S. pyogenes]]''
 
** Group B: ''S. agalactiae''
 
** Group B: ''S. agalactiae''
 
** Group G: ''S. dysgalactiae''
 
** Group G: ''S. dysgalactiae''
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* Gamma-hemolytic
 
* Gamma-hemolytic
 
** Group D streptococci
 
** Group D streptococci
*** ''S. bovis''
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*** ''[[Streptococcus bovis|S. bovis]]''
*** Previously, ''Enterococcus'' spp.
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*** Previously, ''[[Enterococcus]]'' spp.
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  +
[[Category:Gram-positive cocci]]

Revision as of 15:55, 13 August 2019

Microbiology

  • Catalase-negative Gram positive cocci in pairs or chains
  • Two orthogonal classifications
    • Hemolytic properties
      • Alpha: incomplete hemolysis (appears green)
      • Beta: complete hemolysis (appears clear)
      • Gamma: no hemolysis
    • Lancefield antigen group (A-H)

Species

  • Alpha-hemolytic
  • Beta-hemolytic
    • Group A: S. pyogenes
    • Group B: S. agalactiae
    • Group G: S. dysgalactiae
    • Non-Lancefield: S. iniae
  • Gamma-hemolytic