The first Australian Baseline Series: Recommendations for patch testing in suspected contact dermatitis.

Area of Science:

• Dermatology
• Allergology
• Epidemiology

Background:

• Allergic contact dermatitis diagnosis relies on patch testing.
• Monitoring allergen positivity rates is crucial for tracking trends and international comparisons.
• Establishing evidence-based allergen series is vital for accurate diagnosis.

Purpose of the Study:

• To propose the first evidence-based Australian baseline series for patch testing.
• To identify the most frequent and relevant contact allergens in the Australian population.
• To aid in the diagnosis and management of allergic contact dermatitis.

Main Methods:

• A 10-year retrospective review (2001-2010) of patch test data.
• Data collected from institutional contact dermatitis and occupational dermatitis clinics.
• Analysis of 5281 patient cases.

Main Results:

• Identified the top 20 most frequent and relevant positive patch test allergens.
• Key allergens include fragrance mix 1, nickel, potassium dichromate, and formaldehyde.
• Other significant allergens identified: Myroxylon pereirae, p-phenylenediamine (PPD), and thiuram mix.

Conclusions:

• The study successfully identified prevalent contact allergens in Australian patients.
• This research underpins the development of the first Australian baseline patch test series.
• The established series will improve diagnostic accuracy and facilitate epidemiological surveillance.