One person has died after eating cheese contaminated with listeria, as public health bodies in the UK warned consumers not to eat Baronet semi-soft cheeses, because of contamination at exceptionally high levels in some cheeses. An alert from the Food Standards Agency (FSA), updated on Monday, said the Old Cheese Room, a Wiltshire-based manufacturer, had extended its recall of Baronet, Baby Baronet and Mini Baronet soft cheeses because listeria had been found in some batches. These include pack sizes of 1kg, 270g and 200g, with best before dates of 21 and 22 March, and 4, 10, 11, 12, 16 and 18 April. The FSA and UK Health Security Agency (UKHSA) said three cases of listeriosis had been linked to the cheeses, with one individual having died. “Baronet cheese is sold in both small individual rounds and as 1kg wheels. The cheeses are sometimes served sliced from a deli counter, so it may not always be clear whether you have purchased an affected product,” the agencies said in a joint press statement. “If in doubt, consumers are advised to contact the retailer they bought their cheese from to find out if the Baronet cheese they have purchased is from the batches affected and in the meantime to not eat the product.” The agencies said that in some cases the cheeses were contaminated with “exceptionally high levels” of listeria. “The FSA and UKHSA continue to work closely together and with local authorities in response to this outbreak and further recalls may be undertaken if any more products are found to be affected,” the statement said. While symptoms of listeriosis can be similar to flu, in rare cases of severe infection there can be serious complications, such as meningitis. Richard Elson, the head of incidents and response at UKHSA, said listeriosis was a rare infection and most people would experience only mild symptoms such as abdominal pain or diarrhoea for a few days without the need for treatment. However, some people are vulnerable to worse effects. “People with weakened immune systems, who are pregnant, or are infants or elderly are at greater risk of developing severe symptoms,” he said. “If you are in a group who are at higher risk of severe symptoms, there is information on the NHS website about what foods to avoid and what to do if you think you have listeriosis.”