Investigation Update on the Seven Seas Mariner

Cruise Line: Regent Seven Seas Cruises

Cruise Ship: Seven Seas Mariner

Voyage Dates: June 20–30, 2018

Number of passengers who have reported being ill during the voyage out of total number of passengers onboard: 38 of 652 (5.83%)

Number of crew who have reported being ill during the voyage out of total number of crew onboard: 0 of 457 (0.0%)

Predominant symptoms: vomiting, diarrhea

Causative agent: unknown

Actions: In response to the outbreak, Regent Seven Seas Cruises and the crew aboard the ship reported the following actions:

• Increasing cleaning and disinfection procedures according to their outbreak prevention and response plan.
• Collecting stool specimens from passenger and crew gastrointestinal illness cases for testing.
• Making multiple daily reports of gastrointestinal illness cases to VSP.
• Considering comprehensive disinfection procedures in Vancouver, Canada.

The CDC Vessel Sanitation Program is monitoring the outbreak and the ship’s response procedures. Specimens have been collected and tested onboard using a norovirus rapid test; results were positive for norovirus. The specimens will be sent to CDC for additional testing.

Note: The gastrointestinal illness cases reported are totals for the entire voyage and do not represent the number of active (symptomatic) gastrointestinal cases at any given port of call or at disembarkation.