Streptococcus: Difference between revisions

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Streptococcus
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= Streptococcus =
= 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 ==
= Species =


* Alpha-hemolytic
* Alpha-hemolytic
** ''S. pneumoniae'' (usually in pairs)
** ''[[Streptococcus pneumoniae|S. pneumoniae]]'' (usually in pairs)
** Viridans group streptococci
** [[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''
** 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''
*** ''[[Streptococcus bovis|S. bovis]]''
*** Previously, ''Enterococcus'' spp.
*** Previously, ''[[Enterococcus]]'' spp.

[[Category:Gram-positive cocci]]

Revision as of 19:55, 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