Atopy patch test with house dust mite in Chinese patients with atopic dermatitis

Area of Science:

• Dermatology
• Allergology
• Immunology

Background:

• The atopy patch test (APT) is recognized for diagnosing house dust mite-induced cutaneous hypersensitivity in atopic dermatitis (AD).
• Understanding the diagnostic utility of APT in diverse AD patient populations is crucial.

Purpose of the Study:

• To assess the diagnostic value of the APT for mite allergens in Chinese AD patients.
• To compare APT results with skin prick test (SPT) and serum specific IgE levels.

Main Methods:

• 120 atopic dermatitis patients underwent APT, SPT, and serum specific IgE testing for Dermatophagoides pteronyssinus and Dermatophagoides farinae.
• Data analysis focused on comparing positive reactions across the different diagnostic methods.

Main Results:

• 37.5% of patients had a positive APT reaction to mite allergens.
• Positive APT results correlated significantly with air-exposed eczema patterns.
• APT positivity was more frequent in adolescents and adults, irrespective of intrinsic or extrinsic AD type.

Conclusions:

• The APT is valuable for identifying house dust mite-induced cutaneous hypersensitivity in Chinese AD patients.
• APT is particularly useful for patients with air-exposed eczema patterns and in adolescent/adult populations.
• Both intrinsic and extrinsic AD patients demonstrate positive APT reactions to house dust mites.