Streptococcus: Difference between revisions

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Streptococcus
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== Microbiology ==
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==Microbiology==
   
* Catalase-negative Gram positive cocci in pairs or chains
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*Catalase [[Catalase::negative]] [[Stain::Gram-positive]] [[Shape::coccus]] in pairs or chains
* Two orthogonal classifications
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*Two orthogonal classifications
** Hemolytic properties
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**Hemolytic properties on blood agar
*** Alpha: incomplete hemolysis (appears green)
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***Alpha: incomplete hemolysis (appears green)
*** Beta: complete hemolysis (appears clear)
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***Beta: complete hemolysis (appears clear)
*** Gamma: no hemolysis
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***Gamma: no hemolysis
** Lancefield antigen group (A-H)
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**Lancefield antigen group (A-H)
   
== Species ==
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==Species==
   
 
*[[Streptococcus pneumoniae]] (alpha-hemolytic, usually in pairs)
* Alpha-hemolytic
 
 
*[[Viridans group streptococci]]
** ''[[Streptococcus pneumoniae|S. pneumoniae]]'' (usually in pairs)
 
** [[Viridans group streptococci]]
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**[[Streptococcus mitis group]]
*** ''S. mitis''
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***[[Streptococcus mitis]]
*** ''S. oralis''
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***[[Streptococcus oralis]]
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***[[Streptococcus peroris]]
*** ''S. mutans''
 
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***[[Streptococcus infantis]]
*** ''S. sanguinis''
 
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***[[Streptococcus parasanguinis]]
*** ''S. sobrinus''
 
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***[[Streptococcus cristatus]]
*** Milleri group
 
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***[[Streptococcus gordonii]]
**** ''S. anginosus''
 
 
***[[Streptococcus sanguinis]]
**** ''S. constellatus''
 
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**[[Streptococcus salivarius group]]
**** ''S. intermedius''
 
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***[[Streptococcus salivarius]]
* Beta-hemolytic
 
** Group A: ''[[Streptococcus pyogenes|S. pyogenes]]''
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***[[Streptococcus vestibularis]]
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***[[Streptococcus thermophilus]]
** Group B: ''S. agalactiae''
 
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**[[Streptococcus mutans group]]
** Group G: ''S. dysgalactiae''
 
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***[[Streptococcus mutans]]
** Non-Lancefield: ''S. iniae''
 
 
***[[Streptococcus sobrinus]]
* Gamma-hemolytic
 
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***[[Streptococcus ratti]]
** Group D streptococci
 
*** ''[[Streptococcus bovis|S. bovis]]''
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***[[Streptococcus downei]]
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**[[Streptococcus anginosus group]]
*** Previously, ''[[Enterococcus]]'' spp.
 
 
***[[Streptococcus anginosus]]
 
***[[Streptococcus constellatus]]
 
***[[Streptococcus intermedius]]
 
*Pyogenic group
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**[[Streptococcus pyogenes]] (beta-hemolytic, group A)
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**[[Streptococcus canis]]
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**[[Streptococcus urinalis]]
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**[[Streptococcus dysgalactiae]] (beta-hemolytic, group G)
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***[[Streptococcus dysgalactiae subspecies dysgalactiae]]
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***[[Streptococcus dysgalactiae subspecies equisimilis]]
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**[[Streptococcus agalactiae]] (beta-hemolytic, group B)
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**[[Streptococcus porcinus]]
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**[[Streptococcus parauberis]]
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**[[Streptococcus uberis]]
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**[[Streptococcus iniae]]
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*[[Streptococcus bovis group]] (gamma-hemolytic, Group D)
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**[[Streptococcus bovis]]
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**[[Streptococcus infantarius]]
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**[[Streptococcus lutentiensis]]
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**[[Streptococcus equinus]]
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**[[Streptococcus alactolyticus]]
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**[[Streptococcus macedonicus]]
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**[[Streptococcus waius]]
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**[[Streptococcus pasteurianus]]
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*Other streptococci
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**[[Streptococcus acidominimus]]
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***[[Streptococcus suis]]
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***[[Streptococcus ovis]]
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***[[Streptococcus equi]]
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**[[Nutritionally variant streptococci]]
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***[[Granulicatella adiacens]]
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***[[Granulicatella paraadiacens]]
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***[[Granulicatella elegans]]
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***[[Abiotrophia defectiva]]
 
**Previously, [[Enterococcus]] spp.
   
{{DISPLAYTITLE:''Streptococcus'' species}}
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{{DISPLAYTITLE:''Streptococcus''}}
 
[[Category:Gram-positive cocci]]
 
[[Category:Gram-positive cocci]]

Latest revision as of 12:42, 12 March 2022

Microbiology

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

Species