The presence of tree nuts in foods is among the most likely causes of anaphylaxis. The primary tree nuts of concern are almond, Brazil nut, cashew, hazelnut, macadamia, pecan, pine nut, pistachio, coconut, and walnut. AllerTrace Rapid Tests are designed for fast and sensitive detection of allergen residues on surfaces and in food ingredients, rinse waters, beverages, and finished products.