Natural exposure and serum antibodies to house dust mite of mite-allergic children with asthma in Atlanta
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Summary
This summary is machine-generated.House dust mites, particularly Dermatophagoides pteronyssinus and Dermatophagoides farinae, are prevalent allergens in US homes. High levels of these mite allergens are linked to allergic asthma in children, especially during warmer, more humid months.
Area Of Science
- Allergology
- Environmental Health
- Pediatric Asthma Research
Background
- House dust mites are significant asthma allergens in Europe.
- Limited comparable data exists for US homes of asthmatic patients.
- Mite sensitivity is a known factor in asthma exacerbation.
Purpose Of The Study
- To investigate house dust mite distribution and allergen levels in US homes.
- To correlate mite allergen exposure with IgE antibody responses in children with asthma.
- To assess the prevalence of Dermatophagoides species in Atlanta homes.
Main Methods
- Collected dust samples from bedding, floors, and furniture in 20 mite-sensitive asthmatic children's homes.
- Quantified mite allergen levels (antigen P1 equivalent).
- Measured serum IgE antibodies to mite allergens using RAST.
Main Results
- 17/20 houses exceeded 10,000 ng/gm of mite allergen; levels varied widely.
- Allergen levels were higher in bedding/furniture than floors.
- Higher mite counts and allergen levels were found in warmer, more humid months (June-September).
- Mite allergen levels correlated with relative humidity (>50%).
- Dermatophagoides pteronyssinus and Dermatophagoides farinae were prevalent, with specific species dominance in different homes.
- All children showed high IgE to mite allergens, suggesting direct exposure.
Conclusions
- High levels of house dust mite allergens are present in US homes of asthmatic children.
- Exposure to these allergens likely triggers IgE antibody responses in sensitive children.
- Environmental factors like humidity influence mite allergen levels.