At a glance
Learn about the gastrointestinal illness outbreak on the Holland America Line ship Zuiderdam, including outbreak details and actions taken in response.
Outbreak details
Cruise line: Holland America Line
Cruise ship: Zuiderdam
Voyage dates: December 4–December 14, 2024
Voyage number: ZU241204
Date outbreak reported to VSP: December 11, 2024
Number of passengers who reported being ill during the voyage out of total number of passengers onboard: 74 of 1,923 (3.85%)
Number of crew who reported being ill during the voyage out of total number of crew onboard: 4 of 757 (0.5%)
Predominant symptoms: diarrhea and vomiting
Causative agent: norovirus
Actions in response to the outbreak
In response to the outbreak, Holland America Line and the crew aboard the ship reported the following actions:
- Increased cleaning and disinfection procedures according to their outbreak prevention and response plan.
- Collected stool specimens from gastrointestinal illness cases for testing.
- Isolated ill passengers and crew.
VSP is conducting a field response for an environmental assessment and outbreak investigation to assist the ship in controlling the outbreak.
More information
Tracking GI illnesses
Gastrointestinal illness is a commonly used term for acute gastroenteritis (AGE). Reporting gastrointestinal illness is important. When passengers and crew tell the medical center onboard about their symptoms, it helps GI outbreaks get detected quickly. This allows steps to be taken to limit the spread of illness. Medical staff evaluate symptoms to see if they meet our case definition for AGE:
- Three or more loose stools within a 24-hour period or what is more than normal for that person OR
- Vomiting along with one of the following symptoms: diarrhea, muscle ache, headache, abdominal cramp, or fever
Cruise ships are required to report these cases to us.
Note: Cases reported are totals for the entire voyage. It does not mean all people are sick at the same time, such as when they arrive or leave a port or ship.
Learn more about AGE monitoring and how VSP responds to AGE outbreaks.