Group A Streptococcal Infections

(Streptococcus pyogenes)

General Information

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.

Provider Information

This is a Wisconsin disease surveillance category II disease:

Wisconsin case reporting and public health follow-up guidance

Case Reporting and Investigation Protocol (EpiNet): P-01982 Group A Streptococcal infections (PDF)

Questions about Group A Streptococcal Infections? Contact us!
Phone: 608-267-9003 | Fax: 608-267-9009

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Last Revised: October 7, 2021