The ship, which set sail from Belfast on Friday, is at port in Bordeaux after 49 people fell ill from gastrointestinal illness.
Local health authorities in Bordeaux said three passengers had been isolated in their cabins on the Ambition, while other passengers will not be able to disembark in the port.
The Essex-based Ambassador Cruise Line told the BBC a 92-year-old man had ... [1927 chars]