Group A Streptococcal Infections

(Streptococcus pyogenes)

Group A Streptococcus (GAS) or Streptococcus pyogenes is a bacterium commonly found in the throat and on the skin. Many people can carry this bacterium without any symptoms of disease. The majority of group A streptococcal diseases are relatively mild illnesses, such as streptococcal pharyngitis ("strep throat") or impetigo. However, occasionally these bacteria can cause potentially life-threatening "invasive" infections. Invasive infection occurs when group A Streptococci invade parts of the body where bacteria are not normally present, including the blood and soft tissues such as muscle or fat.

Invasive bacteria home

Information on this page has been organized into three categories. Please choose one of the following tabs.

Additional Info Group

Last Revised: September 12, 2019