Maple, T1

Box-elder (Acer negundo) is a rapid-growing, wind-pollinated tree, widely used for shading and ornamental purposes. The tree can attain a height of up to 20 m. The flowering season begins during early spring, with production of the seeds in enormous quantities every year. Exposure to its pollen can trigger allergic respiratory symptoms, such as asthma, allergic rhinitis, and rhino-conjunctivitis. Studies have identified an association between increased concentration of tree pollens (box-elder and maple tree pollens) and high hospitalization rates due to severe asthma. Furthermore, contact dermatitis as a result of exposure to box-elder pollen oil has also been found in two patients. To date, no allergens have been identified; however, few potential allergenic protein bands have been reported. Cross-reactivity has been found to be high with maples, walnut and limited with other tree pollens, such as American sycamore, cottonwood, birch, English oak, and weeping willow.

• Postpone the process of testing immediately after paraclinical studies (roentgen, TC, MRI) and physiotherapy procedures. They can affect test results.

• We recommend avoiding physical activity prior to your examination.