Research and analysis

Listeria monocytogenes: incident reports

Reports of outbreaks and incidents of Listeria monocytogenes in England and Wales.

• From: UK Health Security Agency
• Published: 23 September 2020
• Last updated: 20 August 2026 — See all updates

Documents

National outbreak of a Listeria monocytogenes CC4 t5.248 cluster associated with cook-chill meals

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Results of Listeria species testing from food and environmental sampling undertaken at the food business associated with the CC4 t5.248 outbreak

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Details

These documents summarise outbreaks and incidents of Listeria monocytogenes in England and Wales.

Previous Listeria monocytogenes outbreak investigation reports were published by Public Health England (PHE).

• Investigation into an outbreak of Listeria monocytogenes infections associated with hospital sandwiches, 2019
• Investigation of a case of listeriosis in Yorkshire and the Humber linked to the consumption of hospital sandwiches

Published 23 September 2020

Last updated 20 August 2026 — Show all updates

1. 20 August 2026

   Added 'National outbreak of a Listeria monocytogenes, CC4 t5.248 cluster associated with cook-chill meals' and archived old PHE reports.

2. 6 November 2020

   Updated report added.

3. 23 September 2020

   First published.