This study establishes normal total serum immunoglobulin E (IgE) levels in Venezuelan children, finding it a useful diagnostic tool for clinical allergy in tropical climates when other causes are excluded.
Area of Science:
Immunology
Pediatrics
Tropical Medicine
Background:
Establishing normal serum immunoglobulin E (IgE) levels is crucial for allergy diagnosis.
Tropical climates may influence IgE levels, necessitating region-specific reference ranges.
Previous studies have not adequately defined normal IgE ranges for children in tropical regions like Venezuela.
Purpose of the Study:
To determine the normal range of total serum IgE in disease-free children aged 7-12 years in Caracas, Venezuela.
To assess the diagnostic utility of total serum IgE for clinical allergy in a tropical environment.
To differentiate normal IgE levels from those associated with atopy and parasitic infections.
Main Methods:
Selected 78 disease-free children (aged 7-12) from 1053 children in Caracas, excluding those with atopic/infectious diseases.
Performed PRIST for total serum IgE, CBC, stool ova/parasite search, and specific IgE testing (RAST, skin prick) for common allergens.
Measured antibodies against various viral, bacterial, and Mycoplasma pathogens.
Main Results:
Normal total serum IgE levels in healthy children ranged from 1.7-255 mu/ml, with the highest average (74 mu/ml) at age 9.
These levels significantly differed from age-matched atopic and helminth-infected children.
The study successfully established a reference range for total serum IgE in this population.
Conclusions:
Total serum IgE determination is a valuable diagnostic tool for clinical allergy in tropical climates like Venezuela.
Excluding common causes of elevated IgE is essential for accurate allergy diagnosis.
Region-specific reference ranges are important for interpreting IgE levels in diverse populations.
