Streptococcus mitis: Difference between revisions
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Streptococcus mitis
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=== Microbiology === |
=== Microbiology === |
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*A groups of [[Hemolysis::gamma-hemolytic]] catalase-[[Catalase::negative]] [[Stain::Gram-positive]] [[Shape::coccus]] within the genus [[Streptococcus]] |
*A groups of [[Hemolysis pattern::gamma-hemolytic]] catalase-[[Catalase::negative]] [[Stain::Gram-positive]] [[Shape::coccus]] within the genus [[Streptococcus]] |
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**Includes [[Streptococcus mitis]] and [[Streptococcus oralis]] |
**Includes [[Streptococcus mitis]] and [[Streptococcus oralis]] |
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*On Gram stain, often has an arrow-head shape and grows in pairs or short chains |
*On Gram stain, often has an arrow-head shape and grows in pairs or short chains |
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Latest revision as of 15:19, 27 January 2026
Background
- Part of the normal flora of the oropharynx, female genital tract, gastrointestinal tract, and skin
Microbiology
- A groups of gamma-hemolytic catalase-negative Gram-positive coccus within the genus Streptococcus
- Includes Streptococcus mitis and Streptococcus oralis
- On Gram stain, often has an arrow-head shape and grows in pairs or short chains
- Negative for acetoin production, arginine, esculin, and mannitol and are sorbitol fermentation negative
- Closely related to Streptococcus pneumoniae
Clinical Manifestations
- Generally low virulence
- Invasive disease is much more common in immunocompromised patients, especially neutropenic patients and those undergoing chemotherapy
- Can cause bacteremia, infective endocarditis, dental caries, eye infections, meningitis, and pneumonia
