Salmonella Outbreak Linked to Imported Eggs Sickens 259, One Dead
UKHSA investigates three genetic clusters as hospitalisations rise, with focus on food hygiene and supply chain integrity.
Carla Rooney
A salmonella outbreak has resulted in 259 reported cases and one death across the UK.
The UK outbreak involves three specific, near-identical genetic clusters: t5.9411, t0.24068, and t5.9765. Cases within all three clusters have risen sharply since June.
Hannah Charles, lead epidemiologist for gastrointestinal infections at UKHSA, stated, "Our investigation to date indicates a link to imported eggs, however this investigation remains ongoing."
Professor Ian Young also noted that while the exact causes of these outbreaks have not yet been identified, investigations so far have identified links to imported eggs.
The UK Health Security Agency (UKHSA) claims many newly recorded infections likely occurred in recent weeks, given the lag between people falling ill and cases being confirmed.
The majority of UK cases have reportedly been recorded in England, particularly in London and Yorkshire and Humber. Those affected became sick after eating out from cafes, restaurants, and takeaways.
Our investigation to date indicates a link to imported eggs, however this investigation remains ongoing.
However, investigations in the Netherlands reportedly suggest a link with chicken meat, rather than eggs, presenting a contrasting finding.
The UKHSA works with the Food Standards Agency (FSA) and other public health agencies to investigate the salmonella clusters.
Despite the severity for some, the UKHSA has stated the overall risk to the general public remains low. Hannah Charles reiterated this point: "It’s important to emphasise that the overall risk to the general public remains low."
Salmonella infection typically causes diarrhoea, stomach cramps, vomiting, and fever for a short period in most people, Charles explained.
However, she added, "it can lead to more serious illness, including sepsis requiring hospital admission, particularly in those who are more vulnerable to infection."
There is no evidence that UK-produced eggs are affected by the outbreak, a fact Professor Ian Young also affirmed: "There is no evidence that UK-produced eggs are affected."
Vulnerable groups are advised to eat only thoroughly cooked eggs in restaurants and cafes. Shoppers have been advised to look for the British Lion mark or Laid in Britain assurance scheme.
Good hygiene remains the best protection against foodborne illness. Professor Ian Young advised that eggs thoroughly cooked and handled hygienically should not present a food safety risk.
Charles confirmed that all salmonella samples from patients presenting to hospitals or primary care in England undergo whole genome sequencing. This provides a good understanding of the emergence of new outbreaks.
She concluded, "We will continue to follow up cases and investigate any further common sources if they come to light."