Egg allergy is an immune hypersensitivity to proteins found in chicken eggs, and possibly goose, duck, or turkey eggs. Symptoms can be either rapid or gradual in onset. The latter can take hours to days to appear. The former may include anaphylaxis, a potentially life-threatening condition which requires treatment with epinephrine. Other presentations may include atopic dermatitis or inflammation of the esophagus.In the United States, 90% of allergic responses to foods are caused by cows milk, eggs, wheat, shellfish, peanuts, tree nuts, fish, and soy beans. The declaration of the presence of trace amounts of allergens in foods is not mandatory in any country, with the exception of Brazil.Prevention is by avoiding eating eggs and foods that may contain eggs, such as cake or cookies. It is unclear if the early introduction of the eggs to the diet of babies aged 4–6 months decreases the risk of egg allergies.Egg allergy appears mainly in children but can persist into adulthood. In the United States, it is the second most common food allergy in children after cows milk. Most children outgrow egg allergy by the age of five, but some people remain allergic for a lifetime. In North America and Western Europe, egg allergy occurs in 0.5% to 2.5% of children under the age of five years. The majority grow out of it by school age, but for roughly one-third, the allergy persists into adulthood.
Also, kids presented with hydrops fetalis and / or EFE and / or cardiomyopathy have poor outcome.Some studies showed a genetic contribution to the autoimmune CHB.Among anti Ro/La positive women, older ones have higher possibility of having kids with heart block.Mortality rate in CHB increases with earlier deliveries.Kids with congenital heart block have higher chance to face health-related problems (such as infections) than other kids. Epidemiology
The congenital heart block occurs in 1 child in every 15,000 to 20,000 births.More than 90% of the cases are associated with autoimmune disease and transference of maternal autoantibodies.Without considering the gender, the age of diagnosis or the associated diseases, mortality rate is around 20%.