Nasal response to food ingestion challenge

Area of Science:

• Allergy and Immunology
• Otolaryngology
• Clinical Nutrition

Background:

• Perennial allergic rhinitis (PAR) significantly impacts quality of life.
• The role of food allergy in PAR is often underestimated.
• Diagnostic challenges exist in identifying specific food triggers for nasal symptoms.

Purpose of the Study:

• To investigate the prevalence and diagnostic utility of food challenges in patients with perennial allergic rhinitis.
• To characterize nasal responses to food ingestion in patients with and without a prior history of food allergy.
• To explore the temporal patterns of nasal responses following food challenges.

Main Methods:

• A cohort of 142 patients with PAR underwent diagnostic procedures.
• Methods included food-focused history, intracutaneous tests with food extracts, and rhinomanometry.
• Food ingestion challenges with selected foods were performed, with nasal responses monitored.

Main Results:

• Positive nasal responses to food challenges were observed in 90% of patients with a positive food allergy history and 50% of those with an unknown history.
• Various nasal response patterns were identified: immediate, late, dual late, delayed, and dual delayed.
• Food ingestion challenges demonstrated a significant role for specific foods in eliciting nasal symptoms in PAR patients.

Conclusions:

• Food involvement in perennial allergic rhinitis is more common than typically recognized.
• Food ingestion challenges are crucial for confirming the role of specific foods in PAR.
• The underlying mechanisms of food-induced nasal responses require further investigation, potentially involving diverse hypersensitivity types.