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Diaminodiphenylmethane Sensitization in north-eastern Italy from 1996 to 2012
F Zuliani1, A Prodi1, A B Fortina2
1Clinical Unit of Occupational Medicine, University of Trieste, Trieste, Italy.
Summary
4,4'-Diaminodiphenylmethane (DDM) sensitization is decreasing, with 2.5% of patients showing positive patch tests. Occupational exposure, particularly for mechanics and chemical industry workers, significantly increases the risk of developing DDM contact dermatitis.
Area of Science:
- Dermatology
- Occupational Medicine
- Toxicology
Background:
- 4,4 '-Diaminodiphenylmethane (DDM) is an aromatic amine with industrial applications.
- Exposure to DDM can lead to sensitization and contact dermatitis.
Purpose of the Study:
- To determine the prevalence of DDM sensitization in patients with suspected allergic contact dermatitis.
- To investigate the association between DDM sensitization and occupational exposures.
Main Methods:
- Patch testing of 24,056 patients with suspected allergic contact dermatitis from 1996 to 2012 in north-eastern Italy.
- Data collection via standardized questionnaires on individual characteristics and occupational history.
Main Results:
- Overall prevalence of DDM sensitization was 2.5%, showing a decreasing trend over the study period.
- Higher sensitization rates were observed in the Trieste area (3.2%).
- Mechanics and chemical industry workers exhibited a significantly higher risk of DDM sensitization.
Conclusions:
- DDM sensitization is declining over time.
- Specific occupational exposures are linked to an increased risk of DDM sensitization.
