They present a potential hazard in finishing goods as well. The Rhus genus of plants include poison ivy, poison oak and poison sumac. These plants pose a significant occupational problem to a diverse group of workers in highway maintenance, construction, utilities, agriculture and other occupations with outdoor exposures. Poison ivy dermatitis may even be acquired from the smoke burning plants. Repeated exposure to relatively small amounts of airborne allergens can cause dermatitis at points of contact, as shown in this example of dermatitis in a florist due to chrysanthemums.
Airborne patterns tend to involve the wrinkles and folds of the exposed body areas.
Many of the common allergens are pollens and dusts.