Bald cypress tree (Taxodium distichum) pollen, an allergen.
Fifty-seven nasal and bronchial provocation tests were performed with bald cypress pollen extract (BCE) on 41 subjects. A positive nasal response was elicited in 12 of 17 (71%) subjects with allergic rhinitis and positive BCE skin tests, and in none of 16 control subjects. A positive bronchial challenge was elicited in two of ten extrinsic asthmatics with positive BCE skin tests, and in none of 14 control subjects. BCE-specific IgE was demonstrated by RAST in seven of the 12 (59%) subjects with a positive nasal challenge and in one of the two with a positive bronchial challenge. BC pollen is an aeroallergen.
D000293:Adolescent; D000328:Adult; D001985:Bronchial Provocation Tests; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009299:Nasal Provocation Tests; D011058:Pollen / Q000276:immunology*; D011852:Radioallergosorbent Test; D012882:Skin Tests; D014020:Tissue Extracts; D014197:Trees
D014020:Tissue Extracts