Gastrointestinal illness associated with a long-haul flight

Area of Science:

• Public Health
• Epidemiology
• Infectious Disease Transmission

Background:

• An in-flight vomiting incident on a trans-Pacific flight led to a gastrointestinal (GI) illness outbreak among passengers.
• Some affected passengers later joined a cruise, facilitating further disease surveillance and analysis.

Purpose of the Study:

• To investigate the outbreak of GI illness originating from an in-flight vomiting incident.
• To analyze the transmission dynamics, including aerosol and surface contamination, within an aircraft cabin.

Main Methods:

• Retrospective cohort analysis of passengers and crew on the affected flight.
• Utilized GI illness surveillance data from a subsequent cruise, supplemented with aircraft-specific data.
• Collected information from 224 out of 413 individuals (54.2%) on the flight.

Main Results:

• 33.6% of passengers in zones adjacent to the vomiting incident reported GI illness within 60 hours of arrival.
• Illness patterns suggested a viral infection, with transmission potentially enhanced by toilet cross-contamination.
• Aircraft crew did not recognize the significance of the event, and no pre-arrival health notifications were issued.

Conclusions:

• In-flight vomiting can trigger significant GI illness outbreaks due to aerosol and surface transmission in closed environments.
• Enhanced onboard hygiene practices and isolation of symptomatic individuals are crucial for mitigating infection spread on long-haul flights.
• Improved communication between aircraft and airport health authorities is necessary for effective public health response.