UK health officials are continuing to investigate a nationwide Salmonella outbreak that has now reached 259 confirmed cases and one death, with the latest evidence suggesting a possible link to imported eggs sold through a range of food outlets, including cafés, restaurants and takeaway businesses.
The outbreak, caused by Salmonella Enteritidis t5.9411, is being tracked by the UK Health Security Agency alongside the Food Standards Agency and other public health partners. Investigators said sample dates for the confirmed cases range from 11 August 2025 to 8 August 2026, indicating that the cluster has been active for an extended period and has continued to grow in recent months.
Investigators point to imported eggs as the likely source
In its latest update, UKHSA said the outbreak may be linked to eggs imported to the UK from abroad. The agency added that cases have been associated with eating out, particularly in small cafés, restaurants and takeaway businesses. The risk to the general public remains low, but officials said the investigation is ongoing and further common sources could still be identified.
Public health advice has not changed. UKHSA said Salmonella infection typically causes diarrhoea, stomach cramps, vomiting and fever for a short period in most people, but it can lead to more serious illness, including sepsis requiring hospital admission, especially among vulnerable groups. The Food Standards Agency also reiterated that thoroughly cooked eggs and foods handled hygienically should not pose a food safety risk.
What the latest data shows
As of 25 August 2026, health officials reported 259 confirmed cases linked to the t5.9411 cluster, along with one death. The wider outbreak picture is more complex, with two additional Salmonella Enteritidis clusters also under investigation and case numbers increasing since June 2026. Officials said those clusters are genetically distinct, but food information suggests they may also be associated with imported eggs.
In related surveillance work, UKHSA reported that 207 confirmed cases had been detected in the main outbreak by 13 August, with 38% of people for whom information was available admitted to hospital. The agency said that, in England, all Salmonella samples from patients presenting to hospitals or primary care undergo whole genome sequencing, which helps public health teams understand how outbreaks are emerging and spreading.
Public health response remains focused on containment
Authorities say they are continuing to interview cases, trace food sources and work with local environmental health teams. The Food Standards Agency said there is no evidence that UK-produced eggs are affected, while UKHSA said its investigation remains ongoing and that all three clusters are being reviewed in parallel.
For now, officials are urging people to follow standard food safety guidance, especially when eating dishes that may contain raw or lightly cooked egg. The outbreak adds to a busy late-summer public health picture in the UK, but the latest official position is that the wider public risk from Salmonella remains low.
Further updates are expected as weekly surveillance continues.
UKHSA Health Protection Report
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