The UK Health Security Agency (UKHSA), in collaboration with the Food Standards Agency (FSA), is continuing to investigate an outbreak of Salmonella Enteritidis t5.9411 in the UK. Investigations suggest this outbreak may be linked to eggs imported from abroad, with cases associated with eating out at small cafés, restaurants, and takeaway businesses.
As of 25 August 2026, this cluster has seen 259 confirmed cases and one death. Sample dates for these cases range from 11 August 2025 to 8 August 2026.
Since the initial investigation, UKHSA has identified an increase in two further clusters of cases, t0.24068 and t5.9765. These are genetically distinct but part of the wider Salmonella Enteritidis family, with case numbers for all three clusters rising since June 2026. The genetic relatedness and food information suggest these outbreaks could all be associated with imported eggs.
The t5.9765 cluster has 38 confirmed cases and one death in England as of 25 August 2026, with sample dates from 27 January 2026 to 29 July 2026. The t0.24068 cluster has 177 confirmed cases in England, with no deaths reported, and sample dates from 27 May 2025 to 5 August 2026.
Hannah Charles, Lead Epidemiologist at UKHSA, stated that the investigation indicates a link to imported eggs and remains ongoing. Professor Ian Young, Chief Scientific Adviser for the FSA, confirmed that there is no evidence that UK-produced eggs are affected.