Comparison between modified skin prick test with standardized allergen extracts and Phazet

Area of Science:

• Allergy diagnostics
• Immunology
• Dermatology

Background:

• Skin prick tests (SPTs) are a common and valuable method for allergy diagnosis.
• Standardized allergen extracts enhance the reliability of allergy testing.
• Phazet is a novel puncture test utilizing needles coated with standardized allergens.

Purpose of the Study:

• To compare the diagnostic effectiveness of Phazet against traditional SPTs.
• To evaluate the sensitivity and specificity of Phazet in diagnosing immediate-type allergies.

Main Methods:

• A comparative study involving 130 subjects with suspected allergies.
• Testing performed using six standardized allergen extracts: orchard-grass, olive, mugwort pollens, cat dander, Dermatophagoides pteronyssinus, and Alternaria.
• Patient selection based on clinical history, SPTs, and RAST; control group included at least 20 non-sensitive individuals per allergen.

Main Results:

• Phazet exhibited a sensitivity of 99.4% and a specificity of 99.2%.
• No significant difference in diagnostic effectiveness was found between Phazet and SPTs.
• Standardized extracts improved allergy diagnosis, particularly for challenging allergens like Alternaria.

Conclusions:

• Phazet and SPTs using standardized allergen extracts are equally effective for diagnosing immediate-type allergies.
• The use of standardized extracts represents a significant advancement in allergy diagnostics.
• Phazet offers a reliable alternative for allergy testing.