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Restaurant-associated outbreak of giardiasis
1Division of Field Epidemiology, Centers for Disease Control, Atlanta, Georgia 30333.
The Journal of Infectious Diseases
|September 1, 1992
Summary
A restaurant meeting led to a giardiasis outbreak among 75% of attendees. Contaminated ice served by an infected food handler was the likely cause, highlighting risks in food establishments.
Area of Science:
- Public Health
- Infectious Diseases
- Epidemiology
Background:
- Giardiasis is a parasitic infection.
- Outbreaks can occur in various settings.
- Restaurants are potential venues for disease transmission.
Purpose of the Study:
- To investigate an outbreak of giardiasis.
- To identify the source and transmission route of the infection.
- To assess the role of a restaurant in the outbreak.
Main Methods:
- Case-control study design.
- Analysis of attack rates among attendees and non-attendees.
- Review of restaurant sanitary conditions and food handler information.
Main Results:
- A significant increase in illness among meeting attendees (75%) compared to non-attendees (3%).
- Relative risk of illness for attendees was 23.3.
- Contaminated ice served by food handlers with giardiasis was implicated as the likely vehicle.
Conclusions:
- Restaurants can be a source of giardiasis outbreaks.
- Food handler hygiene and asymptomatic infections pose risks.
- Sanitary violations can contribute to disease transmission.
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