Group A streptococcal disease – invasive (iGAS)

Find out how we define and monitor cases of iGAS, and where you can learn more about this disease.

About iGAS

Group A streptococcus (GAS), is a type of bacteria often found in the throat and on the skin. Group A streptococcal infections commonly cause sore throats, also known as strep throat. In rare cases the bacteria can also cause a severe, life-threatening infection known as invasive group A streptococcal disease (iGAS).

Two of the most severe forms of iGAS are:

  • necrotising fasciitis (sometimes called ‘flesh-eating bacteria’)
  • streptococcal toxic shock syndrome.
Disease type:
Other notifiable
Vaccination available under NIP:
Notifiable disease:

Prevention, symptoms, diagnosis and treatment

The best way to prevent group A streptococcal infection is to maintain good hygiene. The symptoms of group A streptococcal infection depend on where the infection develops in the body.

For information about prevention, symptoms, diagnosis and treatment, see healthdirect's iGAS page.

Surveillance and reporting

iGAS is a nationally notifiable disease.

We monitor cases through the National Notifiable Diseases Surveillance System.

For more on iGAS in Australia, you can search Communicable Diseases Intelligence

Date last updated:

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