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It is naturally found in Thuja and cypress resin, and the main irritant and contact allergen present in thuja wood; in contrast to pine, where the primary irritant is abietic acid. The highest concentrations of plicatic acid can be found in Thuja plicata (western red cedar), but Thuja occidentalis (eastern arborvitae) and Cryptomeria japonica ...
When a person becomes sensitized to wood dust, he or she can suffer severe allergic reactions (such as asthma or dermatitis) after repeated exposure or exposure to lower concentrations of the dust. [3] Other common symptoms associated with wood dust exposure include skin and eye irritation; nasal dryness and obstruction; and prolonged colds. [3]
The OPALS allergy scale was first published in Allergy-Free Gardening, by Thomas Leo Ogren, in 2000. [1] It covers over 3,000 common trees, shrubs, flowers, and grasses. [3] The allergy scale was updated and extended in 2015 in The Allergy-Fighting Garden. [4] [5] [6]
Wood dust becomes a potential health problem when, for example, the wood particles, from processes such as sanding, become airborne and are inhaled. Wood dust is a known human carcinogen. [10] [11] Certain woods and their dust contain toxins that can produce severe allergic reactions. [12]
Name Potential reaction(s) Remarks Balsam of Peru: Redness, swelling, itching, allergic contact dermatitis reactions, stomatitis (inflammation and soreness of the mouth or tongue), cheilitis (inflammation, rash, or painful erosion of the lips, oropharyngeal mucosa, or angles of their mouth), pruritus, hand eczema, generalized or resistant plantar dermatitis, rhinitis, conjunctivitis, and blisters.
An allergy test or food challenge may be performed at an allergy clinic to determine the exact allergens. Since a tree nut allergy can be life-threatening, people who suspect they are having allergic reactions to any kind of tree nut should be tested by an allergist immediately. [14] Tree nut allergies can be genetic and passed down. [15]
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The likelihood and severity of allergic reaction to urushiol is dependent on the degree of unsaturation of the hydrocarbon chain. Less than half of the general population experience a reaction with the saturated urushiol alone, but over 90% do so with urushiol that contains at least two degrees of unsaturation (double bonds). Longer side chains ...