Streptococcus anginosus group

Streptococcus anginosus group


Standard Precautions


General Information

  • Gram positive cocci in chains
  • Facultatively anaerobic
  • Variable hemolysis
  • Normal oral/GI flora.
  • Consists of S. anginosus, S. intermedius, and S. constellatus.
  • Previously known as S. milleri group.
  • Abscesses - head and neck, intra-abdominal, hepatic, cerebral, empyema
  • Bacteremia
  • Rarely endocarditis
  • When these organisms grow in blood culture, look for the abscess
  • Assess dentition
  • Generally abscesses need surgical drainage depending on size/location