What is Group A Streptococcus?
Group A Streptococcus (GAS) bacteria are contagious and can cause both minor and serious infections. GAS bacteria can cause inflammatory diseases. GAS bacteria can also be described as Streptococcus (Group A) or Streptococcal (Group A). Some individuals are at increased risk of GAS infection. To find out more please visit CDC’s webpage on Group A Strep Infection.
Minor Infections | Serious Infections | Inflammatory Diseases |
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Page last review and updated: September 2025
