Salmonella outbreak in UK linked to imported eggs, one dead

The UK Health Security Agency (UKHSA) has declared a national salmonella outbreak, with one person dead and hundreds falling ill. Imported eggs or products containing them are the leading suspects, although this is not yet proven. Evidence also suggests people contracted the bug while dining out, pointing to catering and food services like restaurants and cafes as potential sources.

Salmonella bacteria typically live in the digestive tracts of animals like cattle, pigs, and chickens. Infection occurs through eating contaminated food, drinking contaminated water, or contact with infected animals. Cross-contamination in kitchens also poses a risk. Symptoms include stomach cramps, diarrhea, vomiting, and fever, usually appearing 12 to 72 hours after infection. While most people recover without help, older adults, babies, and those with weakened immune systems are at higher risk of severe illness.

Thorough cooking of eggs and other foods can prevent infection. Handwashing before food preparation, after using the bathroom, and after contact with animals are also crucial protective measures. The majority of the 207 reported cases have occurred in England (199), with smaller numbers in Scotland (6), Wales (1), and Northern Ireland (1). Scientists used whole-genome sequencing to confirm the infections are part of the same outbreak with a common source, noting only a handful of DNA sequence differences among the bacteria.

Genetic testing of the bacteria shows similarities to a previous outbreak linked to imported eggs. UKHSA experts interviewed 114 people involved in the current outbreak, and their responses indicate eggs provide the "strongest signal." About 24 cases had links to five unnamed businesses, with 11 individuals reporting they ate dishes containing eggs at these establishments.