Egg Allergies: A Comprehensive Overview

Chicken eggs represent the second most common food allergen, particularly affecting children.The primary culprits are proteins found within the egg white, including ovomucoid, ovalbumin, ovotransferrin, and lysozyme. While egg yolk allergies are less frequent, the overall prevalence of egg allergy remains notable.

Prevalence and demographics

According to recent data, approximately 1-2% of children under three years of age in Russia experience an egg allergy. While the incidence tends to decrease with age, egg allergy frequently enough persists into adulthood, with complete resolution being uncommon.Globally, studies indicate that egg allergy affects approximately 6-8% of children, though rates can vary depending on geographic location and diagnostic methods.

Understanding Egg Allergens

The proteins within eggs are highly stable and resistant to heat, meaning they can trigger allergic reactions even when the egg is cooked. Ovomucoid is considered the major allergen responsible for most reactions, as it remains stable during cooking.Ovalbumin is another significant allergen, though it is indeed more susceptible to heat degradation.

Symptoms of Egg Allergy

Allergic reactions to eggs can manifest in a variety of ways, ranging from mild to severe. Common symptoms include:

* Skin Reactions: Hives,eczema,itching,and swelling.
* Gastrointestinal Issues: Vomiting, diarrhea, abdominal pain, and cramping.
* Respiratory Symptoms: Wheezing,coughing,runny nose,and difficulty breathing.
* Anaphylaxis: A severe, possibly life-threatening allergic reaction that can cause a sudden drop in blood pressure, difficulty breathing, and loss of consciousness.

Diagnosis and Management

Diagnosis typically involves a combination of medical history review, skin prick testing, and/or blood tests to measure levels of egg-specific antibodies.

Management of egg allergy primarily focuses on strict avoidance of eggs and egg-containing products. This requires careful label reading, as eggs can be hidden in unexpected foods such as baked goods, processed meats, and even some vaccines. Individuals with a diagnosed egg allergy should carry an epinephrine auto-injector (EpiPen) and be educated on its proper use in case of accidental exposure and anaphylaxis.

Emerging Therapies

Research is ongoing to develop therapies for egg allergy, including oral immunotherapy (OIT), which involves gradually introducing small amounts of egg protein to desensitize the immune system. While OIT shows promise, it is not without risks and should only be administered under the supervision of a qualified allergist.

Sources:

* American academy of Allergy,Asthma & Immunology: https://www.aaaai.org/conditions-and-treatments/allergies/food-allergies/egg-allergy

* national Institute of Allergy and Infectious Diseases (NIAID): https://www.niaid.nih.gov/diseases-conditions/egg-allergy

* Mayo Clinic: https://www.mayoclinic.org/diseases-conditions/egg-allergy/symptoms-causes/syc-20377598