House Dust Mite Allergy Test London | Der p1 IgE
This guide explains house dust mite IgE testing, including its year-round indoor exposure pattern and the Der p1 and Der p2 components. Our service is CQC-registered and diagnostic-only: we provide nurse-led venous sample collection and laboratory reporting, while diagnosis and treatment decisions remain with your GP or specialist.
Safety note
If severe breathing symptoms, throat swelling, collapse, or suspected anaphylaxis occur, call 999 immediately. Blood testing is not an emergency service.
Year-round indoor allergen
Unlike seasonal pollens, house dust mite is a persistent indoor allergen. Exposure tends to be highest in bedding, mattresses, carpets, and soft furnishings, which can drive symptoms across all seasons.
Because exposure is continuous, symptom timing alone may not distinguish the trigger, which is where component-resolved IgE testing can support clinical assessment.
Der p1 and Der p2 components
Der p1 and Der p2 are major house dust mite components. They are used in component-resolved testing to help characterise sensitisation patterns.
Results should always be interpreted with your symptom history and exposure context by your GP or specialist, rather than in isolation.
HDM Components Test
Component-level house dust mite testing support, including Der p1 / Der p2 context.
View HDM Components Test →Frequently asked questions
Why is house dust mite a year-round allergen?
House dust mite exposure is typically indoor and persistent throughout the year, unlike seasonal pollens. Symptoms can therefore occur in any month, often worse in bedrooms and soft furnishings.
What are Der p1 and Der p2?
Der p1 and Der p2 are major house dust mite allergen components used in component-resolved testing. They can help characterise sensitisation patterns in selected patients.
Can a blood test alone diagnose dust mite allergy?
No. Specific IgE results are supportive markers and should be interpreted with your symptom history by your GP or specialist. Our clinic provides nurse-led sample collection and laboratory reporting only.
Do antihistamines affect this blood test?
No. IgE blood tests are not affected by antihistamines, so you can usually continue regular antihistamines unless your own clinician advises otherwise.