What health professionals need to know about Group A streptococcal diseases Group A streptococcus (GAS) bacteria, Streptococcus pyogenes, are Gram-positive beta-hemolytic bacteria of which over 240 ...

Beta-hemolytic group A streptococcus or Streptococcus pyogenes, a gram-positive human pathogen that habitually colonizes the throat or skin of the host, is a cause of streptococcal pharyngitis ...

Group A beta hemolytic streptococci, a gram-positive bacteria, is the most common bacterial cause of tonsillopharyngeal infections and will be the subject of the remainder of this discussion.

Cite this: Streptococcus pneumoniae-associated Hemolytic Uremic Syndrome Among Children in North America - Medscape - Sep 01, 2011.

Three strains of beta-hemolytic streptococci required 50 microgm. Of the 10 strains of enterococci, 6 were inhibited by 0.8–6.25 microgm. per milliliter, and 4 required 50 microgm. or more.