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Tests and diagnosis

By Mayo Clinic staff

Your doctor may suspect pet allergy based on symptoms, an examination of your nose and your answers to his or her questions. He or she may use a lighted instrument to look at the condition of the lining of your nose. If you have a pet allergy, the lining of the nasal passage may be swollen or appear pale or bluish.

Your doctor may suspect a pet allergy, based on your comments. For example, you may have a pet allergy if your symptoms are worse when you have direct contact with your pet or when your pet sleeps in your bedroom or on the bed.

Allergy skin test
Your doctor may suggest an allergy skin test to determine exactly what you're allergic to. You may be referred to an allergy specialist (allergist) for this test.

In this test, tiny drops of purified allergen extracts — including extracts with animal proteins — are pricked into your skin's surface. This is usually carried out on the forearm, but it may be done on the upper back.

The drops are left on your skin for 15 minutes before your doctor or nurse observes your skin for signs of allergic reactions. If you're allergic to cats, for example, you'll develop a red, itchy bump where the cat extract was pricked into your skin. The most common side effects of these skin tests are itching and redness. These side effects usually go away within 30 minutes.

Blood test
In some cases, a skin test can't be performed because of the presence of a skin condition or because of interactions with certain medications. As an alternative, your doctor may order a blood test that screens your blood for specific allergy-causing antibodies to various common allergens, including various animals. This test may also indicate how sensitive you are to an allergen.

Treatments and drugs Preparing for your appointment
References
  1. Platts-Mills, TAE. Indoor allergens. In: Adkinson NF, et al. Middleton's Allergy: Principles and Practice. 7th ed. St. Louis, Mo.: Mosby; 2008. http://www.mdconsult.com/books/page.do?eid=4-u1.0-B978-0-323-05659-5..00033-4--cesec40&isbn=978-0-323-05659-5&sid=1049616576&type=bookPage&sectionEid=4-u1.0-B978-0-323-05659-5..00033-4--cesec41&uniqId=217729073-3#4-u1.0-B978-0-323-05659-5..00033-4--cesec41. Accessed Sept. 8, 2010.
  2. Atkins D, et al. Diagnosis of allergic disease. In: Kliegman RM, et al. Nelson Textbook of Pediatrics, 18th ed. Philadelphia, Pa.: Saunders Elsevier; 2007. http://www.mdconsult.com/das/book/body/217729073-4/1049619087/1608/434.html#4-u1.0-B978-1-4160-2450-7..50142-0--cesec3_3369. Accessed Sept. 8, 2010.
  3. Balkissoon RC, et al. Disorders of the upper airways. In: Mason RJ, et al. Murray & Nadel's Textbook of Respiratory Medicine, 5th ed. Philadelphia, Pa.: Saunders Elsevier; 2010. http://www.mdconsult.com/books/page.do?eid=4-u1.0-B978-1-4160-4710-0..00043-2--s0015&isbn=978-1-4160-4710-0&sid=1049622658&type=bookPage&sectionEid=4-u1.0-B978-1-4160-4710-0..00043-2--s0055&uniqId=217729073-5#4-u1.0-B978-1-4160-4710-0..00043-2--s0055. Accessed Sept. 8, 2010.
  4. DeShazo RD, et al. Diagnosis of allergic rhinitis (rhinosinusitis). http://www.uptodate.com/home/index.html. Accessed Sept. 8, 2010.
  5. DeShazo RD, et al. Clinical manifestations and epidemiology of allergic rhinitis (rhinosinusitis). http://www.uptodate.com/home/index.html. Accessed Sept. 8, 2010.
  6. DeShazo RD, et al. Pharmacotherapy of allergic rhinitis. http://www.uptodate.com/home/index.html. Accessed Sept. 8, 2010.
  7. Managing indoor allergen culprits. American Academy of Allergy, Asthma & Immunology. http://www.aaaai.org/patients/elements/2009/12/1209_elements.pdf. Accessed Sept. 8, 2010.
  8. Battling pet allergies. American Academy of Allergy, Asthma & Immunology. http://www.aaaai.org/patients/just4kids/pet_allergies.asp. Accessed Sept. 8, 2010.
  9. Ferguson BJ. Environmental controls of allergies. Otolaryngologic Clinics of North America. 2008;41:411.
  10. Tips to remember: Allergy testing. American Academy of Allergy, Asthma & Immunology. http://www.aaaai.org/patients/publicedmat/tips/whatisallergytesting.stm. Accessed Sept. 8, 2010.
  11. Tips to remember: Allergy shots. American Academy of Allergy, Asthma & Immunology. http://www.aaaai.org/patients/publicedmat/tips/whatareallergyshots.stm. Accessed Sept. 8, 2010.
  12. Wegienka GR, et al. Pet ownership is good for the soul, but is it good for the immune system? American Academy of Allergy, Asthma & Immunology. http://www.aaaai.org/patients/jaci/content.asp?contentid=9995. Accessed Sept. 8, 2010.
  13. Pet allergy. American College of Allergy, Asthma & Immunology. http://www.acaai.org/patients/resources/allergies/Pages/pet-allergy.aspx. Accessed Sept. 8, 2010.
  14. Pet allergies. Asthma and Allergy Foundation of America. http://www.aafa.org/display.cfm?id=8&sub=16&cont=63. Accessed Sept. 15, 2010.
  15. Li JT (expert opinion). Mayo Clinic, Rochester, Minn. Sept. 16, 2010.
DS00859 Nov. 17, 2010

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