Contact allergy: predictive testing in man

Area of Science:

• Dermatology
• Toxicology
• Immunology

Background:

• Skin sensitization is a significant health concern, leading to allergic contact dermatitis.
• Identifying common sensitizers is crucial for public health and regulatory measures.
• Predictive and diagnostic testing are essential tools in managing skin sensitization.

Purpose of the Study:

• To review skin sensitization predictive and diagnostic data for frequently encountered sensitizers.
• To analyze data for eleven common skin sensitizers across Western Europe, Canada, and the United States.
• To discuss factors influencing the extent and degree of skin sensitization.

Main Methods:

• Review of existing skin sensitization data from North American Contact Dermatitis Group and International Contact Dermatitis Research Group.
• Inclusion of data from individual investigators with smaller subject groups.
• Analysis of predictive and diagnostic testing results for specific sensitizing agents.

Main Results:

• Data compiled for eleven common skin sensitizers including drugs (benzocaine, neomycin), cosmetic ingredients (p-phenylenediamine, balsam of Peru), preservatives (formaldehyde, ethylenediamine, parabens, mercurials), and apparel ingredients (nickel, chromium, thiram).
• Extensive patient testing data from major dermatologic groups (1,200 and 4,825 patients).
• Discussion of variability in sensitization data and influencing factors.

Conclusions:

• Predictive tests are valuable for forecasting population responses to sensitizers.
• Diagnostic testing is critical for identifying causative agents of dermatologic problems.
• Understanding factors affecting sensitization is key to prevention and management strategies.