Brits have been warned by health bosses as cases of E.coli (STEC O145) have almost doubled since 11 June.
There have now been 211 recorded cases, with 98 recorded since Tuesday.
The majority of then cases have been recorded in England – 147. While Scotland has seen 35, Wales, 27 and Northern Ireland two.
From 160 of the tested cases so far, 42 percent have seen the patient admitted to hospital.
The symptoms of STEC O145 infection are severe and sometimes bloody diarrhoea, stomach cramps, vomiting and fever.
Trish Mannes, Incident Director at UKHSA, said: “We would like to thank all the cases who have provided information that has enabled us, through epidemiological analysis of questionnaire data and food tracing investigations, to narrow down the likely food product linked to this outbreak.
“Symptoms of infections with STEC include severe and sometimes bloody diarrhoea, stomach cramps, vomiting and fever. If you are unwell, have eaten salad leaves recently and are concerned about any symptoms, follow NHS.uk guidance on when to seek help and the steps you can take to avoid further spread to family and friends.”
She added: “While diarrhoea and vomiting can have a range of causes, there are simple steps you can take to reduce your risk and risk of infecting others. Washing your hands with soap and warm water and using disinfectants to clean surfaces will help stop any further spread of infection.
“If you are unwell with diarrhoea and vomiting, you should not prepare food for others while unwell and avoid visiting people in hospitals or care homes to avoid passing on the infection in these settings. Do not return to work, school or nursery until 48 hours after your symptoms have stopped.”
Darren Whitby, Head of Incidents at the FSA, said: “Sandwich manufacturers are taking a precautionary measure to recall various sandwiches, wraps, subs and rolls in response to findings from investigations by the Food Standards Agency (FSA), Food Standards Scotland (FSS) and UK Health Security Agency (UKHSA) who are working to identify the cause of an ongoing outbreak caused by shiga toxin-producing E.coli (STEC). The full list of products can be found in the product recall information notice (PRIN).
“This is a complex investigation, and we have worked swiftly with the relevant businesses and the local authorities concerned to narrow down the wide range of foods consumed to a small number of salad leaf products that have been used in sandwiches, wraps, subs and rolls. Following thorough food chain analysis, these products are being recalled as a precaution.
“Infections caused by STEC bacteria can cause severe bloody diarrhoea and, in some cases, more serious complications. We therefore advise any consumers who have any of these products not to eat them.
“The FSA is here to ensure that food is safe. If there are products on the market that are not, we won’t hesitate to take action to remove them.”