Publication date: Available online 6 March 2018
Source:Journal of Allergy and Clinical Immunology
Author(s): Amber N. Pepper, Dennis K. Ledford
Nasal and ocular challenges facilitate the evaluation of subjective and objective responses to defined allergen or irritant exposure. Nasal and ocular allergen challenges (NACs and OACs) are the gold standard to diagnose allergic rhinitis and conjunctivitis, respectively, and aid in the evaluation of novel therapies in clinical trials. Additionally, NACs and OACs may help identify medically relevant allergens in clinical practice. Nonspecific or irritant challenges evaluate mucosal hyperreactivity. Direct mucosal challenges, which can be performed in an office or research setting, expose the participant to higher allergen doses than common in the natural environment. Park studies and environmental chambers, most practical in clinical trials, more closely simulate natural allergen exposure. International consensus guidelines for nasal and ocular challenges do not exist. Therefore, the positivity criteria, methodologies, and extract or allergen preparations utilized in challenges vary in the literature. Regardless of these limitations, nasal and ocular challenges are helpful clinical and research tools for nasal and ocular diseases.
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Τρίτη 6 Μαρτίου 2018
Nasal and Ocular Challenges
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