Viridans group streptococci: Difference between revisions
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=== Microbiology === |
=== Microbiology === |
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* Group of [[Stain::Gram-positive]] [[Shape::coccus| |
* Group of [[Stain::Gram-positive]] [[Shape::coccus|cocci]] within the genus [[Genus::Streptococcus]] |
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* Commensal oral flora |
* Commensal oral flora |
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Latest revision as of 18:50, 24 February 2026
Background
Microbiology
- Group of Gram-positive cocci within the genus Streptococcus
- Commensal oral flora
Species
- Streptococcus anginosus group (previously milleri group): most likely to cause invasive pyogenic infections similar to Staphylococcus aureus
- Streptococcus mitis group
- Streptococcus sanguinis group
- Streptococcus salivarius group
- Streptococcus mutans group
Management
- Most commonly penicillin or ceftriaxone, or vancomycin for resistant isolates
- Penicillin non-susceptibility varies by species
- Streptococcus salivarius group is 80% non-susceptible (in Korea1)
- Streptococcus mitis group is 60%
- Streptococcus sanguinis group is 40%
- Streptococcus anginosus group is 6%
- Ceftriaxone does not predict susceptibility to oral cephalosporins
Further Reading
- It’s Not Easy Being Green: the Viridans Group Streptococci, with a Focus on Pediatric Clinical Manifestations. J Clin Microbiol. 2010;48(11):3829-3835. DOI: 10.1128/JCM.01563-10
References
- ^ Sejong Chun, Hee Jae Huh, Nam Yong Lee. Species-Specific Difference in Antimicrobial Susceptibility Among Viridans Group Streptococci. Annals of Laboratory Medicine. 2015;35(2):205-211. doi:10.3343/alm.2015.35.2.205.
