Asthma due to dust from redwood (Sequoia sempervirens).

Abstract

An atopic patient with adult onset of asthma due to sawdust from redwood (Sequoia sempervirens) is described. Specific late asthmatic reaction developed after challenge with inhalation of his own redwood sawdust. No subjective or objective immediate reactions were detected. Avoidance of exposure resulted in improvement. There were no pulmonary or systemic responses to challenge with inhalation of sawdust from pine wood.