Shiga toxin-producing Escherichia coli (STEC) case definition

This document contains the case definitions for Shiga toxin-producing Escherichia coli which is nationally notifiable within Australia. This definition should be used to determine whether a case should be notified.

Page last updated: 23 August 2016

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Surveillance case definition V1.1

Last reviewed
Endorsement date
Implementation date


Title and throughout

  • Removal of vero toxin producing Escherichia coli (VTEC).

Laboratory definitive evidence

  • Removal of ‘isolation of Shiga toxin or vero toxin from a clinical isolate of E.coli’.

Replacement of ‘raw bloody diarrhoea’ with ‘faeces’ for detection of genes encoding Shiga toxins.

CDWG April 2016 CDNA July 2016 1 July 2016
1.0 Initial CDNA case definition (2004)      


Only confirmed cases should be notified.

Confirmed case

A confirmed case requires laboratory definitive evidence only.

Laboratory definitive evidence

  1. Isolation of Shiga toxigenic Escherichia coli from faeces


  1. Detection of the gene(s) encoding the Shiga toxins (stx1 and/or stx2) in faeces or from a clinical isolate of Escherichia coli.

Note: Where STEC is isolated or detected in the context of haemolytic uraemic syndrome (HUS), it should be notified as STEC and HUS.

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