Streptococcus: Difference between revisions
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Streptococcus
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==Microbiology== |
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* Catalase-negative Gram |
*[[Catalase test::Catalase-negative]] [[Stain::Gram-positive]] [[Cellular shape::coccus]] in pairs or chains |
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* |
*Two orthogonal classifications |
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** |
**Hemolytic properties |
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*** |
***Alpha: incomplete hemolysis (appears green) |
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*** |
***Beta: complete hemolysis (appears clear) |
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*** |
***Gamma: no hemolysis |
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** |
**Lancefield antigen group (A-H) |
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== |
==Species== |
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* |
*Alpha-hemolytic |
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** |
**''[[Streptococcus pneumoniae|S. pneumoniae]]'' (usually in pairs) |
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** |
**[[Viridans group streptococci]] |
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*** |
***''S. mitis'' |
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*** |
***''S. oralis'' |
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***''S. mutans'' |
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***''S. sanguinis'' |
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***''S. sobrinus'' |
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*** |
***Milleri group |
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**** |
****''S. anginosus'' |
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**** |
****''S. constellatus'' |
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**** |
****''S. intermedius'' |
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* |
*Beta-hemolytic |
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** |
**Group A: ''[[Streptococcus pyogenes|S. pyogenes]]'' |
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** |
**Group B: ''S. agalactiae'' |
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** |
**Group G: ''S. dysgalactiae'' |
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** |
**Non-Lancefield: ''S. iniae'' |
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* |
*Gamma-hemolytic |
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** |
**Group D streptococci |
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*** |
***''[[Streptococcus bovis|S. bovis]]'' |
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*** |
***Previously, ''[[Enterococcus]]'' spp. |
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{{DISPLAYTITLE:''Streptococcus'' species}} |
{{DISPLAYTITLE:''Streptococcus'' species}} |
Revision as of 00:57, 5 August 2020
Microbiology
- Catalase-negative Gram-positive coccus 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)
- Hemolytic properties
Species
- Alpha-hemolytic
- 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.
- Group D streptococci