A widely distributed snack sold by Grape Tree has been urgently recalled following the detection of Shiga toxin-producing Escherichia coli (STEC), a potentially dangerous bacteria. The Food Standards Agency (FSA) has issued a warning advising consumers not to eat the affected product and to return it for a refund.
The recall concerns 250g packs of Raw Unsalted Macadamia Nuts with a best-before date of 11 July 2026 and bearing the batch code G41 5 101 250610. The product was available across Grape Tree outlets in England, Scotland and Wales, with official notices now placed in all stores where the batch was sold.
Bacterial Strain Linked to Serious Health Risks
According to the FSA, the contamination involves STEC, a strain of E. coli known to produce toxins that can lead to serious illness.
While many strains of E. coli are harmless, STEC can cause severe gastrointestinal symptoms such as bloody diarrhoea, abdominal pain and, in some cases, haemolytic uraemic syndrome (HUS)—a condition that may result in kidney failure.
STEC is commonly associated with undercooked meats, unpasteurised dairy products and contaminated produce. It can also spread via contact with animal faeces or infected individuals. The National Health Service warns that symptoms may appear between one and 14 days after infection and can last up to two weeks.
Although many cases resolve without treatment, complications such as HUS or thrombotic thrombocytopaenic purpura (TTP) may develop, particularly among young children and the elderly.
Grape Tree has advised all customers to check their purchases carefully and avoid consumption if the batch code matches. The FSA reinforced that “point-of-sale notices will be displayed in all retail locations,” outlining actions for consumers.
E. Coli Strain Under Increased Scientific Scrutiny
The STEC strain has recently drawn renewed scientific interest due to emerging research suggesting a potential link to early-onset colorectal cancer.
A study led by US researchers, analysing tumour DNA from nearly 1,000 patients in 11 countries, found traces of colibactin, a toxin produced by some E. coli strains, including non-O157 STEC, in cancerous tissue of individuals under 40.
Although causality has not been confirmed, the findings underscore the urgency of detecting and mitigating sources of E. coli contamination. According to the researchers, while the study was “strong” and of “good quality”, further longitudinal data will be required to establish a direct connection between STEC exposure and cancer development.
For now, UK health authorities continue to prioritise public safety through food recalls and transparent communication. Consumers who suspect they have purchased the affected nuts can obtain further guidance by contacting Grape Tree customer service or visiting the FSA website.
