More than 1,700 passengers and crew are kept on a cruise ship following a gastroenteritis outbreak, according to multiple reports. The ship is operating on a 14-night itinerary, and the illness is identified while the voyage is under way. An operator statement from Ambassador Cruise Line, described in reports, says authorities in Bordeaux instruct all passengers and crew to remain on board. The guidance is presented as a temporary public health measure as officials manage the outbreak onboard. Reported figures across the sources indicate the number affected or detained is over 1,700, covering both passengers and crew. The coverage does not provide further details about the specific number of confirmed cases, medical actions taken beyond the instruction to stay on board, or the expected timeline for review. The reports focus on the placement of the ship in Bordeaux and the directive preventing passengers and crew from leaving while authorities conduct their response.