Streptococcus: Difference between revisions

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Streptococcus
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==Microbiology==
= Streptococcus =
 
   
 
*Catalase [[Catalase::negative]] [[Stain::Gram-positive]] [[Shape::coccus]] in pairs or chains
== Classification ==
 
 
*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==
* 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)
 
   
 
*[[Streptococcus pneumoniae]] (alpha-hemolytic, usually in pairs)
== Species ==
 
 
*[[Viridans group streptococci]]
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**[[Streptococcus mitis group]]
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***[[Streptococcus mitis]]
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***[[Streptococcus oralis]]
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***[[Streptococcus peroris]]
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***[[Streptococcus infantis]]
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***[[Streptococcus parasanguinis]]
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***[[Streptococcus cristatus]]
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***[[Streptococcus gordonii]]
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***[[Streptococcus sanguinis]]
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**[[Streptococcus salivarius group]]
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***[[Streptococcus salivarius]]
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***[[Streptococcus vestibularis]]
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***[[Streptococcus thermophilus]]
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**[[Streptococcus mutans group]]
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***[[Streptococcus mutans]]
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***[[Streptococcus sobrinus]]
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***[[Streptococcus ratti]]
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***[[Streptococcus downei]]
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**[[Streptococcus anginosus group]]
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***[[Streptococcus anginosus]]
 
***[[Streptococcus constellatus]]
 
***[[Streptococcus intermedius]]
 
*Pyogenic group
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**[[Streptococcus pyogenes]] (beta-hemolytic, group A)
 
**[[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]]
 
*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.
   
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{{DISPLAYTITLE:''Streptococcus''}}
* Alpha-hemolytic
 
  +
[[Category:Gram-positive cocci]]
** ''S. pneumoniae'' (usually in pairs)
 
** Viridans group streptococci
 
*** ''S. mitis''
 
*** ''S. oralis''
 
*** ''S. mutans''
 
*** ''S. sanguinis''
 
*** ''S. sobrinus''
 
*** Milleri group
 
**** ''S. anginosus''
 
**** ''S. constellatus''
 
**** ''S. intermedius''
 
* Beta-hemolytic
 
** Group A: ''S. pyogenes''
 
** Group B: ''S. agalactiae''
 
** Group G: ''S. dysgalactiae''
 
** Non-Lancefield: ''S. iniae''
 
* Gamma-hemolytic
 
** Group D streptococci
 
*** ''S. bovis''
 
*** Previously, ''Enterococcus'' spp.
 

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