Answer
Answer
Poison ivy and poison oak (Toxicodendron species) are the main causes of occupational contact dermatitis in outdoor workers. Toxicodendron dermatitis accounts for 10% of all lost-time injuries among members of the US Department of Agriculture Forest Service. As many as 25% of forest firefighters need to leave the fire line because of severe Toxicodendron dermatitis. Forestry workers may also develop woodcutter's eczema, an allergic reaction to airborne SQLs in Frullania plants. These liverworts grow on tree trunks in the American and Canadian Pacific Northwest. [22]
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Media Gallery
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Young poison ivy plant Toxicodendron radicans. The leaves of 3 are easily identified. Reprinted with permission from WB Saunders.
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Mature poison ivy Toxicodendron radicans. Fruit arises in an axillary position in the angle between the leaf and the branch.
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Mature gingko tree, Ginkgo biloba, growing in Frederick, Md.
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Ginkgo biloba has a characteristic bilobed leaf.
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Daisy flower, Leucanthemum species, with characteristic flower heads of the Asteraceae family.
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Finger of a florist with an eczematous plaque caused by sensitivity to tulipalin A, the allergen contained in Peruvian lilies (family Alstroemeria).
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Airborne contact dermatitis in a patient who is allergic to sesquiterpene lactones. The involvement of the anterior part of the neck seen here is typically absent in photodermatoses. Courtesy of Dirk Elston, MD.
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Irritant reaction on the scrotum after contact with garlic (Allium sativum). Courtesy of Martin Giandoni, MD. Reprinted with permission from Cutis 67: 193, 2001.
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Tulipa species (Liliaceae). Reprinted with permission from Cutis (2003;71:347-348). Copyright 2003, Quadrant HealthCom, Inc.
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The coverings of tulip bulbs can cause irritant contact dermatitis, and tulipalin A and B can cause allergic contact dermatitis. Reprinted with permission from Cutis (2003;71:347-348). Copyright 2003, Quadrant HealthCom, Inc.
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Alstroemeria ligtu (Alstroemeriaceae). Reprinted with permission from WB Saunders.
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Primula obconica
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Urtica dioica, the common stinging nettle.
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Prickly pears, Opuntia species.
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Dieffenbachia bauseii (Araceae), also known as dumb cane.
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Daffodils, Narcissus pseudonarcissus, are also known as Lent lilies because they bloom in late March and early April in much of the United States.
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Chili peppers, Capsicum annum.
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