Investigation Update on the Zaandam

Cruise Line: Holland America Line

Cruise Ship: Zaandam

Voyage Dates: 11/26-12/11

Number of ill passengers out of total number of passengers: 64 of 1431 (4.47%)

Number of ill crew out of total number of crew: 4 of 617 (0.67%)

Predominant symptoms: diarrhea and vomiting

Actions: Holland America Line and the crew aboard the ship took the following actions to respond to the outbreak:

• increased cleaning and disinfection procedures,
• sent daily updates to CDC until the number of ill people returned to expected levels.

The number of ill people returned to expected levels for the voyage ending on 12/21/06.