Investigation Update on the Zaandam

Cruise Line: Holland America Line

Cruise Ship: Zaandam

Voyage Dates: 3/19 -4/3

Number of ill passengers out of total number of passengers: 100 of 1428 (7.00%)

Number of ill crew out of total number of crew: 13 of 611 (2.13%)

Predominant symptoms: diarrhea and vomiting

Actions: In response to the outbreak, Holland America Line and the crew aboard the ship took the following actions:

• increased cleaning and disinfection procedures;
• sent senior environmental health specialists for additional support;
• collected stool specimens for analysis;
• sent daily updates to CDC until the number of ill people returned to expected levels.

On April 3rd, VSP staff boarded the ship in San Diego to conduct a targeted environmental health assessment and make recommendations.

VSP staff continued to monitor the ship until the number of ill people returned to expected levels (sailing dates: 4/3-4/08).