Rhinitis - Allergic Diagnostics

Laboratory Tests and Ancillaries

Allergy Testing

Allergy testing is considered as the results would help in the management of the disease and the identification of allergens to facilitate avoidance. Referral to a clinical immunology or allergy specialist is recommended for allergy testing and when allergen immunotherapy is considered.    

Please see section on Immunotherapy and Specialist Referral for further information.

Skin Tests and Specific IgE Tests

Skin tests and specific IgE tests are used to differentiate allergic from nonallergic rhinitis or to determine specific causative allergens. The skin test is preferred due to its better sensitivity, faster results, and lesser cost. 

Nasal Smear for Eosinophils 

Eosinophils may be seen in both allergic and nonallergic rhinitis. The presence of eosinophilia predicts a good response to topical nasal corticosteroid medication. Nasal smears for eosinophilia may be performed when allergic symptoms are present.