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Influenza B virus outbreak on a cruise ship--Northern Europe, 2000
Abstract:
During June 23-July 5, 2000, an outbreak of respiratory illnesses occurred on the MS Rotterdam (Holland America Line & Windstar Cruises) during a 12-day Baltic cruise from the United Kingdom to Germany via Russia. The ship carried 1311 passengers, primarily from the United States, and 506 crew members from many countries. Although results of rapid viral testing for influenza A and B viruses were negative, immunofluorescence staining and viral culture results implicated influenza B virus infection as the cause of the outbreak. This report summarizes the findings of the outbreak investigation conducted by the ship's medical department and describes the measures taken to control the outbreak. Travelers at high risk for complications of influenza who were not vaccinated with influenza vaccine during the preceding fall or winter should consider receiving influenza vaccine before travel with large tourist groups at any time of year or to certain regions of the world.
Insights
An influenza B virus outbreak sickened passengers on a Baltic cruise. Influenza vaccination is recommended for high-risk travelers before group travel.
Area of Science:
- Epidemiology
- Infectious Diseases
- Public Health
Background:
- Respiratory illness outbreaks can significantly impact public health, especially in closed environments like cruise ships.
- Timely investigation and control measures are crucial to mitigate disease spread during travel.
Purpose of the Study:
- To investigate the cause of a respiratory illness outbreak on a cruise ship.
- To identify the causative agent and implement control strategies.
- To provide recommendations for preventing future outbreaks.
Main Methods:
- Conducted an outbreak investigation on the MS Rotterdam cruise ship.
- Utilized immunofluorescence staining and viral culture for viral identification.
- Assessed epidemiological data, including passenger and crew demographics and illness patterns.
Main Results:
- Identified influenza B virus as the causative agent of the respiratory illness outbreak.
- Rapid viral testing initially yielded negative results for influenza A and B.
- The outbreak affected a significant number of passengers and crew members.
Conclusions:
- Influenza B virus was responsible for the respiratory illness outbreak on the cruise.
- Influenza vaccination is recommended for high-risk individuals prior to group travel.
- Enhanced surveillance and rapid diagnostic methods are important for controlling outbreaks in travel settings.