[In vitro and in vivo acari tests]

Area of Science:

• Allergen immunotherapy
• Pediatric allergy diagnostics
• Immunological assays

Context:

• Perennial allergic diseases like asthma, rhinitis, and atopic dermatitis affect many children.
• Accurate diagnosis of mite sensitivity is crucial for effective management.
• Established diagnostic methods include skin prick tests and serum IgE measurements.

Purpose:

• To evaluate the diagnostic utility of in vivo (prick skin test) and in vitro (total serum IgE, specific allergen IgE - RAST) tests for house dust mite allergy in children.
• To assess the correlation between different diagnostic methods and clinical presentation.
• To determine the most reliable diagnostic approach for mite-sensitive pediatric patients in our region.

Summary:

• A study of 40 children with perennial allergic diseases found all had positive prick skin tests to mites (D. pteronissinus, D. farinae).
• Total serum IgE was elevated in 95% but showed poor, non-significant correlation with skin test reactivity.
• Specific allergen IgE (RAST) was positive in 95% with a statistically significant correlation (r=0.31, p<0.05) to skin tests.

Impact:

• Clinical history and prick skin tests are deemed sufficiently accurate for diagnosing mite-induced allergies in children in this region.
• The findings support the continued use of these primary diagnostic tools, potentially reducing reliance on more complex or less correlated tests.
• Highlights the importance of localized validation for allergy diagnostic methods.