Early regular egg exposure in infants with eczema: A randomized controlled trial

Area of Science:

• Pediatric Allergy and Immunology
• Clinical Nutrition
• Immunology

Background:

• Observational studies suggest early allergen consumption may lower food allergy risk.
• Infants with moderate-to-severe eczema are at higher risk for developing food allergies.

Purpose of the Study:

• To investigate if early, regular oral egg exposure reduces IgE-mediated egg allergy in infants with eczema.
• To assess the safety and efficacy of early egg introduction in a high-risk infant population.

Main Methods:

• A double-blind, randomized controlled trial involving infants aged 4-8 months.
• Infants received daily pasteurized whole egg powder or rice powder.
• Primary outcome: IgE-mediated egg allergy at 12 months, confirmed by challenge and skin prick tests.

Main Results:

• A significant proportion of infants (31%) experienced allergic reactions to egg powder.
• Egg-specific IgE was present in 36% of infants before any known egg ingestion.
• While not statistically significant, the egg group had a lower incidence of IgE-mediated egg allergy (33% vs. 51%).
• Egg-specific IgG4 levels were significantly higher in the egg group.

Conclusions:

• Early regular oral egg exposure may induce immune tolerance and reduce egg allergy incidence in infants with eczema.
• Caution is advised due to pre-existing sensitization in many high-risk infants by 4 months of age.