Invasive Group A Streptococcal (iGAS) Disease

This document contains the case definitions for invasive Group A Streptococcal (iGAS) disease which is nationally notifiable within Australia. This definition should be used to determine whether a case should be notified.

Page last updated: 30 June 2021

Surveillance case definition

Version

Summary of changes

Endorsement date

Implementation date

1.0

Initial CDNA case definition

CDNA 25 June 2021

1 July 2021

Reporting

Only confirmed cases should be notified.

Confirmed cases

A confirmed case requires laboratory definitive evidence only.

Laboratory definitive evidence

  1. Isolation of Group A Streptococci (Streptococcus pyogenes) by culture from a normally sterile site.
  2. OR

  3. Detection of Group A Streptococci (Streptococcus pyogenes) by nucleic acid testing from a normally sterile site.

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