Streptococcus pyogenes
Streptococcus pyogenes, or Group A Streptococcus, is a spherical, Gram-positive bacterium. S. pyogenes displays streptococcal group A antigen on its cell wall and typically produces large zones of be...
Streptococcus pyogenes - Wikipedia
Group A streptococcal infection
The group A β-hemolytic streptococcus (GAS) (a single species, Streptococcus pyogenes, constituting Lancefield group A) is a form of β-hemolytic Streptococcus bacteria. It is a gram-positive bacteriu...