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Urushiol-induced contact dermatitis (also called Toxicodendron dermatitis or Rhus dermatitis) is a type of allergic contact dermatitis caused by the oil urushiol found in various plants, most notably sumac family species of the genus Toxicodendron: poison ivy, poison oak, poison sumac, and the Chinese lacquer tree. [1]
Urushiol is an oleoresin contained within the sap of poison ivy and related plants, and after injury to the plant, or late in the fall, the sap leaks to the surface of the plant, where under certain temperature and humidity conditions the urushiol becomes a blackish lacquer after being in contact with oxygen. [15] [16] [11] Urushi lacquer is ...
Sap contact with fruit skin during or post-harvest Soft nose Excessive nitrogen/low calcium levels Spongy tissue Unknown post-harvest disorder Stem end cavity Unexplained pre-harvest fruit injury Sunburn Sudden exposure of fruit to high air temperature and/or bright light Tipburn High soluble salts
The sap is then filtered, heat-treated, or coloured before applying onto a base material that is to be lacquered. Curing the applied sap requires "drying" it in a warm, humid chamber or closet for 12 to 24 hours where the urushiol polymerizes to form a clear, hard, and waterproof surface. In its liquid state, urushiol can cause extreme rashes ...
According to MacPhail, smoking was recommended as a treatment for allergies as recently as 1934 in the United States. Dr. Tania Elliott, an allergist and chief medical officer of Virtual Care at ...
Mango leaves, stems, peels, and sap contain urushiol, an allergen also present in poison ivy, poison oak, and poison sumac that can cause urushiol-induced contact dermatitis in susceptible people. [citation needed] Cross-reactions between mango contact allergens and urushiol have been observed. Those with a history of poison ivy or poison oak ...
Peanut allergy, which can be life-threatening, is on the rise. Scientists are working on promising treatment options. (Illustration: Blake Cale; photo: Getty Images) (illustration by Blake Cale ...
Allergic contact dermatitis is common, affecting up to 20% of all people. [5] People sensitive to one allergen are at an increased risk of being sensitive to others. [5] Family members of those with allergic contact dermatitis are at higher risk of developing it themselves. [5] Women are at higher risk of developing allergic contact dermatitis ...