Streptococcus: Difference between revisions
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Streptococcus
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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 = |
+ | == Species == |
* Alpha-hemolytic |
* Alpha-hemolytic |
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Revision as of 16:08, 15 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
