The BBC reports that 47 people who visited a cafe in Portsmouth have been confirmed as suffering from salmonella infection.
NHS Portsmouth, the Health Protection Agency and Portsmouth City Council are investigating the cases associated with the Tenth Hole Tea Rooms in Southsea.
All became ill in August and four went needed hospital care, but there have been no new cases since 1 September.
The tea rooms have co-operated with the probe and implemented preventative measures, the city council said.
Paul Edmondson-Jones, director of public health for both NHS Portsmouth and the city council, said,
"While an initial investigation was begun by the council on 25 August, it was stepped up to other agencies on 1 September when the scale of the incident became apparent. It was only in the last couple of days that we have been able to accurately confirm the Tenth Hole as the source of the outbreak, which is now over."