Common environmental contact allergens in Singapore

Area of Science:

• Dermatology
• Allergology
• Immunology

Background:

• Contact allergens are prevalent triggers for various dermatological reactions.
• Allergic contact dermatitis (ACD) is the most frequent manifestation.
• Immunologic contact urticaria (ICU) involves IgE-mediated mechanisms.

Purpose of the Study:

• To identify and rank common contact allergens responsible for ACD in Singapore.
• To determine the specific allergens associated with ICU in the Singaporean population.
• To report on the incidence and common agents of photoallergic contact dermatitis.

Main Methods:

• Retrospective analysis of clinical data and patch testing results.
• Epidemiological survey of contact allergy prevalence.
• Identification of causative agents through patient history and diagnostic tests.

Main Results:

• Nickel and fragrances are the leading causes of ACD in Singapore.
• Proteinaceous foodstuffs and rubber latex products are primary triggers for ICU.
• Musk Ambrette is the most frequent agent causing photoallergic contact dermatitis.

Conclusions:

• Understanding regional allergen prevalence is crucial for effective ACD and ICU management.
• Nickel, fragrances, foodstuffs, and rubber latex represent significant contact allergens in Singapore.
• Musk Ambrette warrants attention as a cause of photoallergic reactions.