Douglas fir
Clinical Relevance
IgE mediated reactions
Anecdotal evidence suggests that asthma, allergic rhinitis and allergic conjunctivitis, similar to reactions caused by other members of this family, are possible following exposure to pollen from this tree; however, no specific studies have been reported to date.
The Douglas fir is not an important allergen in urbanized communities – except those situated close to Douglas fir plantations, where the prevalence of atopic sensitization to pollen from this tree is expected to be high.
Other reaction
The tussock moth caterpillar, occurring in forested areas of Oregon, was associated with itching of the skin and eyes, nasal discharge, cough, and, at times, respiratory difficulty in 41 of 428 individuals working in a forest.
Cross-Reactivity
Extensive cross-reactivity between the different individual species of the genus could be expected.
References
- Press E, Googins JA, Poareo H, Jones K. Health hazards to timber and forestry workers from the tussock moth. Arch Environ Health 1977;32(5):206-210.
- Yman L. Botanical relations and immunological cross-reactions in pollen allergy. 2nd ed. Pharmacia Diagnostics AB. Uppsala. Sweden. 1982: ISBN 91-970475-09