Test library
Cat IgE Test
A cat dander allergy test measures IgE antibodies against cat allergens, mainly the protein Fel d 1 found in saliva and skin flakes. It helps confirm whether cats are behind persistent nasal, eye, or breathing symptoms.
Order Cat Dander Allergy Test
Order online and visit a local collection site, or choose an at-home kit where available. No referral and no insurance required.
Order Cat Dander Allergy Test- Typical turnaround
- 1-3 business days
- Starting price
- From $118
- Results
- Confidential, online
Quick answer
The cat allergy test measures immunoglobulin E antibodies against cat allergens in a blood sample. The main allergen, Fel d 1, is produced in cat saliva and sebaceous glands and becomes airborne on tiny skin flakes and hair. Because the protein is small and sticky, it can linger in a home long after a cat has left. A qualified healthcare provider interprets the result.
What this test measures
Cat allergy is one of the most common indoor allergies. The key allergen, Fel d 1, is not the fur itself but a protein in cat saliva, sebaceous glands, and urine. Cats spread it onto their coat while grooming, and it attaches to small particles that stay suspended in the air and settle on surfaces. This is why reactions can occur even in homes without a resident cat.
The test measures allergen-specific IgE against cat epithelium and dander in serum. It reports whether antibodies are present and may give a quantitative level or reactivity class. Some laboratories also test individual cat allergen components, which can add detail when results are ambiguous or when a clinician wants a fuller picture.
A positive result indicates sensitization to cat allergens. It does not measure how severe symptoms will be, and some people with antibodies have only mild complaints. A clinician uses the result with the symptom pattern and environment to decide on the most practical steps.
- Cat epithelium and dander specific IgE
- Fel d 1 specific IgE
- Total serum IgE
- Quantitative allergen-specific IgE level
- IgE reactivity class for cat
- Cat serum albumin specific IgE
- Related pet allergen components
Why people order this test
- Investigate nasal, eye, or breathing symptoms in a home with a cat
- Confirm sensitization before making lifestyle decisions
- Clarify symptoms that persist after leaving a feline environment
- Compare reactivity across pet allergens
- Provide objective information for discussion with a provider
How to prepare
No fasting is required. A blood sample is drawn from a vein, usually at the arm. Follow the laboratory's instructions, particularly if the test is combined with other allergen tests.
Understanding your results
Results are usually available within one to three business days. The report shows the specific IgE level and reactivity class for cat allergens. An elevated value indicates sensitization, and a healthcare provider interprets it with the person's symptoms and home environment.
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Frequently Asked Questions
What causes cat allergy?
The main allergen is Fel d 1, a protein found in cat saliva, skin, and urine. It spreads onto the coat during grooming and becomes airborne on small particles.
Can I be allergic to cats even if I don't live with one?
Yes. Cat allergens are sticky and can travel on clothing or remain in a building long after a cat has been there.
Does the test measure how severe my allergy is?
No. It shows whether sensitization is present, not how strong future reactions will be.
How is the sample collected?
A small blood sample is drawn from a vein and analyzed for IgE antibodies that react to cat allergens.
Do I need to fast?
No fasting is required for this test.
Ready to get tested?
Order online and visit a collection site near you, or choose a mail-in kit. No referral and no insurance required.
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Every page on this site is reviewed for clarity, sourcing, and accuracy. We update our library as testing options, collection networks, and accreditation standards change.