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Causes

By Mayo Clinic staff

All food allergies are caused by an immune system malfunction. Your immune system mistakenly identifies certain egg proteins as harmful, triggering the production of immunoglobulin E (IgE) antibodies to neutralize the protein (allergen). The next time you come in contact with these proteins, these IgE antibodies recognize them and signal your immune system to release histamine and other chemicals. Histamine and other body chemicals cause a range of allergic signs and symptoms. Histamine is partly responsible for most allergic responses, including runny nose, itchy eyes, dry throat, rashes, hives, nausea, diarrhea, labored breathing and anaphylactic shock.

Both egg yolks and egg whites contain a number of proteins that can cause allergies, but allergy to egg white is more common. It's possible for breast-fed infants to have an allergic reaction to egg proteins in breast milk.

References
  1. Food allergy: An overview. National Institute of Allergy and Infectious Diseases. http://www3.niaid.nih.gov/topics/foodAllergy/PDF/foodallergy.pdf. Accessed July 12, 2009.
  2. Kurowski K, et al. Food allergies: Detection and management. American Family Physician. 2008;77:1678.
  3. Lack G. Food allergy. New England Journal of Medicine. 2008;359:1252.
  4. Anaphylaxis. Asthma and Allergy Foundation of America. http://www.aafa.org/print.cfm?id=9&sub=23&cont=324. Accessed July 16, 2009.
  5. Chapman JA, et al. Food allergy: A practice parameter. Annals of Allergy, Asthma and Immunology. 2006;96:S1.
  6. Sicherer SH. Food allergen avoidance. http://www.uptodate.com/home/index.html. Accessed May 22, 2009.
  7. Egg allergy. Asthma and Allergy Foundation of America. http://www.aafa.org/print.cfm?id=9&sub=20&cont=523. Accessed July 16, 2009.
  8. Flu vaccine and egg allergy. American College of Allergy, Asthma and Immunology. http://www.acaai.org/public/advice/Fluvaccine_eggallergy.htm. Accessed July 16, 2009.

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Sept. 25, 2009

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