Respiratory atopy in Rio de Janeiro.

Area of Science:

• Epidemiology
• Allergology
• Immunology

Background:

• Asthma and rhinitis are common conditions with significant public health impact.
• Identifying specific allergens is crucial for effective management and treatment of allergic diseases.
• Previous research indicates regional variations in allergen prevalence.

Purpose of the Study:

• To determine the prevalence of immediate hypersensitivity to common allergens in patients with asthma and/or rhinitis in Rio de Janeiro.
• To evaluate the utility of allergy skin testing in identifying specific triggers for these conditions.

Main Methods:

• An epidemiologic study involving 1,410 patients diagnosed with asthma and/or rhinitis.
• Allergy skin testing, including intradermal and Multi-Test Lincoln Diagnostics techniques, was performed on 1,219 participants.
• Thirteen allergens were tested, including house dust, mites (Dermatophagoides farinae), various pollens, molds, and animal dander.

Main Results:

• House dust was the most frequent positive allergen identified, with a prevalence of 74.08%.
• Mites (Dermatophagoides farinae) were the second most common allergen, showing positive skin tests in 62.43% of patients.
• A high rate of positive skin tests indicates significant allergic sensitization within the study population.

Conclusions:

• House dust and mites are the predominant allergens responsible for allergic respiratory diseases in the studied population in Rio de Janeiro.
• Allergy skin testing is an effective diagnostic tool for identifying specific environmental allergens in patients with asthma and rhinitis.
• These findings highlight the importance of allergen avoidance and targeted immunotherapy for managing allergic conditions in this region.