UK health authorities are continuing to investigate several clusters of Salmonella Enteritidis in England that may be linked to imported eggs used by hospitality and catering businesses. The outbreak has grown over recent weeks, and the latest official figures show hundreds of confirmed cases across multiple clusters.
The UK Health Security Agency outbreak update says investigations are continuing alongside the Food Standards Agency and other public-health partners. UKHSA’s statistical releases were updated again on 24 September 2026, showing that the outbreak remains active and that case counts are still being revised as laboratory confirmations come through.
For consumers, the useful message is not that all eggs are unsafe. The current investigation has identified potential links to imported eggs supplied to some hospitality and catering businesses, while the Food Standards Agency says there is no identified link to UK-produced eggs or poultry at this stage.
What UKHSA is investigating
UKHSA is monitoring three clusters of Salmonella Enteritidis. These clusters are genetically distinguishable through whole-genome sequencing, which allows public-health teams to identify groups of cases that are likely to be related even when people became ill in different places.
One cluster, identified as t5.9411, has accounted for the largest number of confirmed cases. UKHSA has also been tracking t0.24068 and t5.9765. The exact totals continue to change because there is a delay between someone becoming ill, providing a sample, laboratory confirmation and genomic sequencing.
That lag is important. A weekly case count is not a real-time measure of how many people became sick in the previous seven days.
What the latest data show
By mid-September, UKHSA had reported 355 confirmed cases in England linked to the t5.9411 cluster, with one death reported in that cluster. Other related clusters had also accumulated substantial numbers of cases.
The agency’s later statistical update, published on 24 September, continued to track the outbreak through week 38. Figures may be revised as new samples are confirmed and linked to the clusters.
For that reason, readers should use the most recent UKHSA statistical release rather than relying on a screenshot or old social-media post with a fixed case number.
Are UK eggs affected?
The Food Standards Agency says its investigation has not identified a link to UK-produced eggs or poultry. The current concern relates to potential links with imported eggs supplied to hospitality and catering businesses.
That distinction matters because some headlines can create the impression that all eggs sold in the UK are part of the outbreak.
Most UK hen flocks are subject to vaccination, monitoring and biosecurity requirements under schemes such as the British Lion mark and Laid in Britain assurance programmes.
Why eating out has featured in the investigation
UKHSA has said cases have been associated with a range of food outlets including cafés, restaurants and takeaway businesses. Imported eggs may be used in catering supply chains that consumers never see directly.
That does not mean every restaurant or takeaway is affected. Investigators use interviews, food-chain tracing and laboratory evidence to identify common exposures and potential sources.
If a specific product or business requires action, the Food Standards Agency can publish food alerts, recalls or other advice.
What Salmonella infection feels like
Salmonella can cause diarrhoea, abdominal cramps, fever, nausea and sometimes vomiting. Symptoms often begin within several days of exposure, although timing can vary.
For many healthy adults, illness is unpleasant but self-limiting. Fluids and rest are usually important because diarrhoea and vomiting can cause dehydration.
Some people are at greater risk of severe illness, including older adults, very young children and people with weakened immune systems or certain underlying conditions.
When to seek medical help
People should seek medical advice if symptoms are severe, persistent or accompanied by signs of dehydration. Warning signs can include very little urine, dizziness, marked weakness, persistent vomiting, blood in the stool or inability to keep fluids down.
Someone who is frail, immunosuppressed, very young or otherwise at increased risk may need earlier assessment.
Call 999 for life-threatening deterioration, collapse, severe breathing problems or other emergency symptoms.
How Salmonella spreads
Salmonella is commonly associated with contaminated food, but infection can also spread through poor hand hygiene after contact with animals, contaminated surfaces or an infected person.
In egg-related outbreaks, risk can arise if contaminated eggs are eaten raw or lightly cooked, or if bacteria are transferred from shells, hands or utensils to other food.
Good kitchen hygiene therefore matters even when the exact source of an outbreak is still being investigated.
What households can do
Wash hands after handling raw eggs and before preparing other food. Keep raw ingredients and ready-to-eat food separate. Clean utensils and surfaces properly after use.
Follow current Food Standards Agency advice on cooking eggs, especially when preparing food for people who may be more vulnerable to infection.
If an official recall or food alert is issued, follow the specific instructions rather than trying to judge safety from appearance or smell.
What people should not do
Do not assume an egg is contaminated because it was imported. The investigation concerns potential supply-chain links, not a statement that every imported egg is unsafe.
Do not assume British Lion-marked eggs are part of the outbreak unless official guidance changes. At present, the Food Standards Agency says there is no identified link to UK-produced eggs.
And do not rely on washing eggs as a safety measure. Washing can spread contamination around the kitchen and may damage the shell’s natural protective layer.
What to do if someone in the household is ill
Anyone with diarrhoea or vomiting should wash their hands carefully after using the toilet and before handling food. They should avoid preparing food for other people while symptomatic.
Extra care is important in households with older adults, babies or immunosuppressed people because the consequences of infection may be more serious.
Our Family Carers & Home Recovery guide includes practical advice on monitoring hydration, appetite and deterioration when someone is recovering at home.
How public-health teams trace an outbreak
Investigators combine several types of evidence. Laboratory sequencing can show whether bacterial isolates are genetically related. Interviews can identify shared foods or venues. Food-supply tracing can then identify whether several outlets received products from a common supplier.
None of those steps alone is always conclusive. That is why official wording often uses phrases such as “potential link” or “evidence suggests” while the investigation continues.
Why the figures can change after publication
UKHSA says it can take several weeks to determine whether a case belongs to a particular outbreak cluster. Samples first need to be collected, tested locally and then analysed by specialist laboratories.
That means older weekly totals may be revised upward later. It also means a fall in newly reported cases for one week does not automatically prove the outbreak is over.
What cafés and restaurants should be doing
Food businesses have legal responsibilities around food safety, hygiene and traceability. Where suppliers or regulators identify a risk, businesses may need to remove products, review preparation practices or cooperate with tracing investigations.
Consumers should not try to identify affected businesses through rumours or social media. If a specific food outlet is linked to formal action, authorities can publish that information through official channels.
Why vulnerable people need extra caution
Older adults, young children and people with weakened immune systems can become more seriously unwell from gastrointestinal infections. Dehydration can also develop more quickly in frail people.
If you are caring for someone at higher risk, monitor fluid intake, urine output, alertness and whether they can keep drinks down. Seek advice sooner if you are concerned.
Our Healthcare Navigation guide explains how to organise symptom timelines and key information before contacting NHS services.
What happens next
UKHSA and the Food Standards Agency will continue publishing updates while the incident remains active. Food-chain investigations may narrow the source further or identify additional control measures.
Readers should check the latest GOV.UK or Food Standards Agency information if they see a new claim about affected products, case numbers or recalls.
The bottom line
The current Salmonella investigation is serious enough to warrant continued public-health attention, but it does not mean all eggs in the UK are unsafe. The evidence so far points toward potential links with imported eggs used in parts of the catering and hospitality supply chain, while UK-produced eggs have not been identified as the source.
For households, the proportionate response is good food hygiene, attention to official alerts and prompt medical advice when illness is severe or affects someone at higher risk.
What the outbreak means for people who eat out regularly
The investigation has focused partly on hospitality and catering supply chains, so people who frequently eat in cafés, restaurants or takeaways may wonder whether they should avoid eggs altogether. Current official advice does not support a blanket avoidance of eating out or eating eggs. The appropriate response is to follow specific food alerts and hygiene advice rather than trying to identify risk from appearance alone.
Food businesses are responsible for sourcing, storage and preparation. If regulators identify a specific supplier or product that requires action, that information can be communicated through formal food-safety channels.
What about raw or lightly cooked egg dishes?
Dishes containing raw or lightly cooked egg deserve more attention because adequate cooking reduces bacterial risk. UK food-safety guidance distinguishes between eggs produced under recognised assurance schemes and other eggs, particularly when food is being prepared for vulnerable people.
If you are preparing food for an older adult, young child, pregnant person or someone with a weakened immune system, follow current Food Standards Agency advice carefully and avoid improvising with uncertain egg sources.
How dehydration becomes the main home-care risk
For many people with Salmonella, the immediate home-care issue is fluid loss from diarrhoea and vomiting. Small, frequent sips may be easier to tolerate than large drinks. Older adults and frail people can become dehydrated before the severity is obvious.
Watch for reduced urination, dizziness, dry mouth, marked weakness, confusion or inability to keep fluids down. Those signs can justify medical advice even if the diarrhoea itself does not appear dramatic.
Why antibiotics are not automatically required
Many uncomplicated Salmonella infections improve without antibiotics. Treatment decisions depend on severity, age, risk factors and whether infection has spread beyond the gut. Unnecessary antibiotics can cause side effects and contribute to antimicrobial resistance.
People should not use leftover antibiotics or medicines prescribed to somebody else. A clinician can decide whether testing or specific treatment is appropriate.
When food handlers need extra caution
People who work with food, in healthcare or with vulnerable groups may need specific advice about when it is safe to return after gastrointestinal illness. Employers and local public-health teams can have additional rules depending on the role and the organism involved.
Anyone with active diarrhoea or vomiting should follow hygiene guidance and should not prepare food for others while ill.
This article provides general food-safety and health information. Outbreak details can change as investigations progress, so check the latest UKHSA and Food Standards Agency updates.
