What is the role of skin testing in the workup of mold-related allergic rhinitis and conjunctivitis?

Updated: Sep 18, 2017
  • Author: Shih-Wen Huang, MD; Chief Editor: Harumi Jyonouchi, MD  more...
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Answer

Immediate hypersensitivity skin testing is the most useful method to detect IgE antibody against mold allergens. Testing can be performed by using the prick or intradermal method. The preferred site is the upper part of the back for the prick method or the arms for the intradermal method. Histamine and normal sodium chloride solution are most commonly used as positive and negative controls, respectively. Results are recorded 15 minutes after the test is performed. Wheal diameter more than 3 mm above the reaction of the negative control is considered a positive result. Mold allergen extracts used for the skin test depend on the prevalence of various molds in the region, as identified with annual atmospheric sampling. The most common molds are Alternaria, Aspergillus, Cephalosporium, Curvularia, Epicoccum, Fusarium, Helminthosporium, Hormodendrum, Mucor, Penicillium, Phoma, Pullularia, Rhizopus, and Stemphyllium species.


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