Reference values of immunoglobulin E in umbilical cord sera

Area of Science:

• Pediatrics
• Immunology
• Allergy Prevention

Background:

• The National Program for the Prevention of Allergic Diseases initiated IgE testing in umbilical cord serum in 1986.
• Previous research lacked specific normal IgE values for Cuban children, relying on international data.
• Establishing local reference values is essential for accurate diagnosis and management.

Purpose of the Study:

• To determine normal umbilical cord serum immunoglobulin E (IgE) concentrations in Cuban neonates.
• To establish a baseline for the National Program for the Prevention of Allergic Diseases in Cuba.
• To address the lack of country-specific reference values.

Main Methods:

• A cohort of 900 neonates was studied.
• Exclusion criteria included maternal factors known to elevate serum IgE.
• The microELISA-IgE technique was employed for precise measurement.

Main Results:

• The mean umbilical cord serum IgE level was determined to be 0.64 IU/ml.
• The lower limit for normal IgE was found to be 0.06 IU/ml.
• The upper limit for normal IgE was established at 6.83 IU/ml.

Conclusions:

• This research provides the first normal reference values for umbilical cord serum IgE in Cuban neonates.
• These established values are vital for the effective implementation of allergy prevention strategies in Cuba.
• The findings support the ongoing efforts in pediatric allergy research and public health initiatives.