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Abstract

Shiga-toxin producing (STEC) O157 is a food-borne pathogen which causes gastrointestinal illness in humans. Ruminants are considered the main reservoir of infection, and STEC exceedance has been associated with heavy rainfall. In September 2022, a large outbreak of STEC O157:H7 was identified in the United Kingdom (UK). A national-level investigation was undertaken to identify the source of the outbreak and inform risk mitigation strategies. Whole genome sequencing (WGS) was used to identify outbreak cases. Overall, 259 cases with illness onset dates between 5 August and 12 October 2022, were confirmed across the UK. Epidemiological investigations supported a UK grown, nationally distributed, short shelf-life food item as the source of the outbreak. Analytical epidemiology and food chain analysis suggested lettuce as the likely vehicle of infection. Food supply chain tracing identified Grower X as the likely implicated producer. Independent of the food chain investigations, a novel geospatial analysis triangulating meteorological, flood risk, animal density and land use data was developed, also identifying Grower X as the likely source. Novel geospatial analysis and One Health approaches are potential tools for upstream data analysis to predict and prevent contamination events before they occur and to support evidence generation in outbreak investigations.

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/content/10.2807/1560-7917.ES.2024.29.36.2400161
2024-09-05
2024-12-12
http://instance.metastore.ingenta.com/content/10.2807/1560-7917.ES.2024.29.36.2400161
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An outbreak of Shiga toxin-producing Escherichia coli (STEC) O157:H7 associated with contaminated lettuce and the cascading risks from climate change, the United Kingdom, August to September 2022
<p class="citation"> <span>Citation style for this article:</span> <span class="meta-value authors"> <a href="/search?value1=Neil+Cunningham&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Cunningham Neil</a>, <a href="/search?value1=Claire+Jenkins&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Jenkins Claire</a>, <a href="/search?value1=Sarah+Williams&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Williams Sarah</a>, <a href="/search?value1=Joanna+Garner&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Garner Joanna</a>, <a href="/search?value1=Bernd+Eggen&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Eggen Bernd</a>, <a href="/search?value1=Amy+Douglas&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Douglas Amy</a>, <a href="/search?value1=Tina+Potter&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Potter Tina</a>, <a href="/search?value1=Anthony+Wilson&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Wilson Anthony</a>, <a href="/search?value1=Giovanni+Leonardi&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Leonardi Giovanni</a>, <a href="/search?value1=Lesley+Larkin&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Larkin Lesley</a>, <a href="/search?value1=Susan+Hopkins&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Hopkins Susan</a></span>. An outbreak of Shiga toxin-producing Escherichia coli (STEC) O157:H7 associated with contaminated lettuce and the cascading risks from climate change, the United Kingdom, August to September 2022. <a href="/content/ecdc">Euro Surveill.</a> 2024;29(36):pii=2400161. <a href="https://doi.org/10.2807/1560-7917.ES.2024.29.36.2400161" title="doi link" target="_blank">https://doi.org/10.2807/1560-7917.ES.2024.29.36.2400161</a> <span class="ES_Article_citation"> <span class="generated">Received</span>: 15 Mar 2024;&nbsp;&nbsp; <span class="generated">Accepted</span>: 11 Jul 2024 </span> </p>
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