Streptococcus anginosus group


Standard Precautions
Standard Precautions

General Information

Pathogen information

Gram positive cocci in chains, facultatively anaerobic, variable hemolysis.


Normal oral/GI flora.

Consists of S. anginosus, intermedius, and constellatus.

Used to be called S. milleri group.

Associated syndromes

  • Abscesses - intra-abdominal, hepatic, cerebral, empyema

  • Bacteremia

  • Rarely endocarditis

Additional Information

When these organisms grow in blood culture, look for the abscess.

Generally abscesses need surgical drainage depending on size/location.