Scientists are currently investigating a national outbreak of Salmonella, which has affected 156 people.
There have been 55 cases in Hampshire, 25 in London, 33 in Cheshire and 43 in the West Midlands. Cases have also been confirmed in Austria and France (49 cases).
The cases had been dismissed as isolated incidents, but as now been seen as potentially linked.
Dr Paul Cleary, consultant epidemiologist leading the investigation for Public Health England (PHE) said: “We are working with our colleagues across PHE, at the Food Standards Agency, in local authorities and with other public health organisations in Europe to investigate the cause of this outbreak.”
Testing has revealed that all of the people had been infected with closely related strains.
Dr Cleary added: “We will continue to monitor the situation and if any further public health action is necessary then we will ensure that this takes place.”