Characterization of Relevant Bovine Dander Allergen Components.

Area of Science:

• Allergy and Immunology
• Occupational Health
• Proteomics

Background:

• Occupational allergic diseases diagnosis relies on allergen extract quality.
• Cattle-related allergies (rhinitis, asthma, urticaria) require improved diagnostic methods.
• This study developed and evaluated an in-house cow dander extract for enhanced diagnostics.

Purpose of the Study:

• To produce and characterize an in-house cow dander extract.
• To assess the diagnostic performance of the in-house extract in clinical tests.
• To compare the in-house extract with commercial bovine dander extracts.

Main Methods:

• Skin prick tests (SPTs) and nasal allergen provocation tests were conducted on patients with suspected cattle-related occupational diseases.
• Western blot and tandem mass spectrometry were used to identify specific IgE-protein reactions and allergens.
• The in-house extract's performance was compared against commercial extracts.

Main Results:

• The in-house extract demonstrated 100% sensitivity and 94% specificity in SPTs.
• Nasal allergen provocation tests showed 100% sensitivity for detecting occupational rhinitis.
• Major allergens identified include odorant-binding protein (Bos d OBP), bovine serum albumin (Bos d 6), and lipocalin (Bos d 2), with several new minor allergens discovered.

Conclusions:

• Occupational rhinitis is caused by multiple allergens in bovine dander.
• Accurate diagnosis of bovine allergen-related occupational diseases necessitates a comprehensive range of tested allergens.
• The developed in-house extract offers a superior diagnostic tool for cattle-related occupational allergies.