Guidance

Invasive group A streptococcal disease: managing close contacts in community settings

Guidelines for managing close community contacts of cases of invasive group A streptococcal (iGAS) disease, including flow diagrams.

• From: UK Health Security Agency
• Published: 19 March 2008
• Last updated: 5 September 2025 — See all updates

Documents

UK guidelines for the management of contacts of invasive group A streptococcus (iGAS) infection in community settings

Ref: UKHSA publication gateway number GOV-14237

PDF, 1.22 MB, 78 pages

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Accessible text versions of the 4 algorithms

HTML

Factsheet 1. Invasive group A streptococcal infection (iGAS)

Ref: UKHSA publications gateway number GOV-14237

PDF, 121 KB, 2 pages

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Factsheet 2. Invasive group A streptococcal infection (iGAS) – information for people who inject drugs

Ref: UKHSA publications gateway number GOV-14237

PDF, 93.2 KB, 2 pages

This file may not be suitable for users of assistive technology.

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Illustrated factsheet 2. Invasive group A streptococcal infection (iGAS) – information for people who inject drugs or are experiencing homelessness

Ref: GOV-19404

PDF, 1.19 MB, 2 pages

Details

This publication is to help health professionals manage cases of invasive group A streptococcal (iGAS) disease.

Risk information for close community contacts of cases of iGAS infection is also available.

Previous guidance was published by Public Health England.

Published 19 March 2008

Last updated 5 September 2025 + show all updates

1. 5 September 2025

   Added 'Illustrated factsheet 2. Invasive group A streptococcal infection (iGAS) – information for people who inject drugs or are experiencing homelessness'.

2. 7 March 2023

   Updated information on risk assessment in nurseries, schools and other childcare settings (section 4.1).

3. 2 March 2023

   Changed to using diagnosis date (definition included) instead of onset date to define close contacts and the 10-day post-exposure period. Clarified actions required within 10 days of exposure and for the 30-day surveillance period, and that actions should be undertaken for both confirmed and probable cases. Added Clarithromycin as a second line choice for chemoprophylaxis.

4. 15 December 2022

   Corrected algorithm 4.

5. 15 December 2022

   Updated guidance.

6. 19 March 2008

   First published.