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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]]
**[[Streptococcus mitis group]]
***[[Streptococcus mitis]]
***[[Streptococcus oralis]]
***[[Streptococcus peroris]]
***[[Streptococcus infantis]]
***[[Streptococcus parasanguinis]]
***[[Streptococcus cristatus]]
***[[Streptococcus gordonii]]
***[[Streptococcus sanguinis]]
**[[Streptococcus salivarius group]]
***[[Streptococcus salivarius]]
***[[Streptococcus vestibularis]]
***[[Streptococcus thermophilus]]
**[[Streptococcus mutans group]]
***[[Streptococcus mutans]]
***[[Streptococcus sobrinus]]
***[[Streptococcus ratti]]
***[[Streptococcus downei]]
**[[Streptococcus anginosus group]]
***[[Streptococcus anginosus]]
***[[Streptococcus constellatus]]
***[[Streptococcus intermedius]]
*Pyogenic group
**[[Streptococcus pyogenes]] (beta-hemolytic, group A)
**[[Streptococcus canis]]
**[[Streptococcus urinalis]]
**[[Streptococcus dysgalactiae]] (beta-hemolytic, group G)
***[[Streptococcus dysgalactiae subspecies dysgalactiae]]
***[[Streptococcus dysgalactiae subspecies equisimilis]]
**[[Streptococcus agalactiae]] (beta-hemolytic, group B)
**[[Streptococcus porcinus]]
**[[Streptococcus parauberis]]
**[[Streptococcus uberis]]
**[[Streptococcus iniae]]
*[[Streptococcus bovis group]] (gamma-hemolytic, Group D)
**[[Streptococcus bovis]]
**[[Streptococcus infantarius]]
**[[Streptococcus lutentiensis]]
**[[Streptococcus equinus]]
**[[Streptococcus alactolyticus]]
**[[Streptococcus macedonicus]]
**[[Streptococcus waius]]
**[[Streptococcus pasteurianus]]
*Other streptococci
**[[Streptococcus acidominimus]]
***[[Streptococcus suis]]
***[[Streptococcus ovis]]
***[[Streptococcus equi]]
**[[Nutritionally variant streptococci]]
***[[Granulicatella adiacens]]
***[[Granulicatella paraadiacens]]
***[[Granulicatella elegans]]
***[[Abiotrophia defectiva]]
**Previously, [[Enterococcus]] spp.


{{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 16:42, 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