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Specific immune response to occupational antigens in asymptomatic egg processing workers.
Giovanna Zanoni1, Silvia Martini, Antonio Zedde
1Department of Pathology, Section of Immunology, University of Verona, 37134, Italy. giovanna.zanoni@univr.it
American Journal of Industrial Medicine
|August 14, 2002
Summary
Workers in egg processing factories show immune responses to avian proteins, even without symptoms. This highlights the risk of occupational respiratory diseases from inhaling egg antigens and the need for monitoring.
Area of Science:
- Occupational Health
- Immunology
- Environmental Science
Background:
- Hen's egg proteins are recognized sensitizers.
- Exposure to these proteins can lead to occupational respiratory diseases.
- Prevalence of sensitization in asymptomatic workers was unknown.
Purpose of the Study:
- To determine the prevalence of sensitization to occupational antigens.
- To investigate immune responses in asymptomatic egg processing workers.
- To assess the link between environmental exposure and sensitization.
Main Methods:
- Evaluated 77 asymptomatic egg processing workers.
- Assessed clinical history, respiratory function, and atopy.
- Measured specific antibodies to environmental/occupational antigens and environmental antigen concentration.
- Compared findings with 116 unexposed controls.
Main Results:
- Workers exhibited higher rates of specific IgE and precipitin positivity to egg components compared to controls.
- Elevated egg white protein concentration was detected in the egg breaking area.
- Inhaled avian proteins triggered immune responses.
Conclusions:
- Asymptomatic workers exposed to egg proteins develop immune responses to occupational antigens.
- Environmental antigen concentration reduction is recommended.
- Clinical monitoring of sensitized workers is crucial.