Allergic contact dermatitis from lichen acids

Wood, Blair; Rademaker, Marius

doi:10.1111/j.1600-0536.1996.tb02232.x

Cited by 5 publications

(4 citation statements)

References 3 publications

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“…Reports of non‐occupational sensitization via direct exposure to lichens are rare. Lichen dermatitis has previously been reported in a young girl who was sensitized via direct contact with lichens when tree climbing (3). To our knowledge, this is the first reported case of allergic contact dermatitis to lichen arising in a rock climber.…”

Section: Discussionmentioning

confidence: 94%

Lichen dermatitis in a rock climber

et al. 2005

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Section: Discussionmentioning

confidence: 94%

Lichen dermatitis in a rock climber

et al. 2005

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“…D-usnic acid has been included in deodorant sprays for its antimicrobial properties. 17 Although the general public perceives plant-derived ''natural'' ingredients as being safer, these substances are a significant cause of allergic contact dermatitis. 18,19 Rademaker 20 reported a case of dermatitis from fragrance allergy, likely attributable to usnic acid.…”

Section: Discussionmentioning

confidence: 99%

Allergic contact dermatitis from a natural deodorant: A report of 4 cases associated with lichen acid mix allergy

Sheu

Simpson

Law

et al. 2006

Journal of the American Academy of Dermatology

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“…Patients with lichen acid allergy are often photosensitive (4, 5, 6), and positive photopatch tests to lichens (6) and lichen acids (4, 6, 7, 8) have been observed, but their clinical relevance is usually not clear (6). Immediate allergy to lichens with skin and respiratory symptoms in combination with algae sensitivity has also been described (9).…”

mentioning

confidence: 99%

“…Allergic contact dermatitis from lichens is primarily seen in forestry (1, 5) and horticultural work (9), but it may be associated with all kinds of outdoor activities (4) like hunting (5) and picking berries (5) and contact with living trees (10), firewood (5), wood dust (11) or other barked wood (4, 5, 9). Lichens can also cause airborne contact dermatitis, which may simulate photodermatitis (4).…”

mentioning

confidence: 99%

Occupational allergic contact dermatitis from lichens in present‐day Finland

2005

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Lichens are abundant in forests, living on trees, soil, stones and rocks. They contain usnic acid and other lichen acids that are contact allergens. Lichens and liverworts cause woodcutter's dermatitis, eczema that appears in the forest on the bare skin areas, especially in cold and wet weather. Occupational allergic contact dermatitis from lichens occurs in forestry and horticultural workers and in lichen pickers. Lichens can cause immediate allergy, contact urticaria, rhinitis and asthma and probably also photoallergic contact dermatitis. Lichens are used for the manufacture of oak moss absolute, a fragrance constituent. Oak moss absolute contains lichen acids and is one of the commonest contact allergens. Lichen acid allergy develops either from contact with lichens or from fragrances. We describe 4 cases of occupational allergic contact dermatitis from lichens during the past decade: 2 were farmers and 2 gardeners. 3 of them had allergic reactions to fragrance mix and oak moss absolute. Lichen contact allergy is an old, partly forgotten, syndrome that should be remembered for symptoms in contact with barked wood or wood dust.

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Allergic contact dermatitis from lichen acids

Cited by 5 publications

References 3 publications

Lichen dermatitis in a rock climber

Lichen dermatitis in a rock climber

Allergic contact dermatitis from a natural deodorant: A report of 4 cases associated with lichen acid mix allergy

Occupational allergic contact dermatitis from lichens in present‐day Finland

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