Paprika rhinoconjunctivitis case reveals new occupational Capsicum allergens

Area of Science:

• Allergology
• Occupational Medicine
• Food Science

Background:

• Occupational allergies can arise from workplace exposures.
• Specific allergens in spices like paprika and cayenne were previously unidentified.
• Capsicum species are widely used in culinary settings.

Observation:

• A 28-year-old woman developed work-related rhinoconjunctivitis after four years in a kebab restaurant.
• Diagnostic methods included skin prick tests, serum specific IgE, and nasal provocation tests.
• Western blot analysis identified specific IgE protein reactions.

Findings:

• Paprika, cayenne, and curry allergens were identified using tandem mass spectrometry.
• Defensin J1 and Vicilin were identified as major allergens in paprika and cayenne.
• Vicilin was also detected in curry, indicating cross-reactivity.

Implications:

• Two novel occupational respiratory allergens from Capsicum species were identified.
• These allergens differ from previously known bell pepper allergens.
• Significant spice handling in occupational settings presents a notable allergy risk.