Streptococcus: Difference between revisions
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Streptococcus
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= Microbiology = |
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== Classification == |
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* 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) |
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= Species = |
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* Alpha-hemolytic |
* Alpha-hemolytic |
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** ''S. pneumoniae'' (usually in pairs) |
** ''[[Streptococcus pneumoniae|S. pneumoniae]]'' (usually in pairs) |
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** Viridans group streptococci |
** [[Viridans group streptococci]] |
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*** ''S. mitis'' |
*** ''S. mitis'' |
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*** ''S. oralis'' |
*** ''S. oralis'' |
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**** ''S. intermedius'' |
**** ''S. intermedius'' |
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* Beta-hemolytic |
* Beta-hemolytic |
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** Group A: ''S. pyogenes'' |
** Group A: ''[[Streptococcus pyogenes|S. pyogenes]]'' |
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** Group B: ''S. agalactiae'' |
** Group B: ''S. agalactiae'' |
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** Group G: ''S. dysgalactiae'' |
** Group G: ''S. dysgalactiae'' |
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* Gamma-hemolytic |
* Gamma-hemolytic |
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** Group D streptococci |
** Group D streptococci |
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*** ''S. bovis'' |
*** ''[[Streptococcus bovis|S. bovis]]'' |
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*** Previously, ''Enterococcus'' spp. |
*** Previously, ''[[Enterococcus]]'' spp. |
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[[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)
- 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