Allergens in Tennessee

According to the American Academy of Allergy Asthma & Immunology, allergies affect as many as 40 to 50 million Americans, with a recent survey revealing that over 50 percent of households tested positive for at least six detectable allergens. In addition to allergens found inside homes, there are natural outdoor allergens that affect individuals. The state of Tennessee in the southeastern quadrant of the United States is not without its share of allergens.

Cedar Elm

• The pollen from the cedar elm, scientific name Ulmus crassifolia, is an allergen found in the state of Tennessee. The cedar elm is found in woodlands and cultivated areas, can survive in poor, wet soil and is in flowering season from late summer to fall. The pollen from this deciduous tree causes a dermatological and respiratory allergic reaction. The dermatological reaction from the cedar elm pollen can cause a red skin rash and blisters; the wind-borne pollen of this tree has also been shown to cause moderate to high respiratory allergic reactions.

Annual Ragweed

• The pollen and foliage from the annual ragweed, scientific name Ambrosia artemisiifolia, are allergens that are common to the state of Tennessee. The annual ragweed is classified as an herb that grows in disturbed areas and causes dermatological and respiratory allergic reactions. Physical contact with this plant has been known to cause dermatitis and photoallergic dermatitis. Ragweed's pollen is a major cause of hay fever allergies.

American Hazelnut

• The pollen from the American hazelnut, scientific name Corylus americana, is another allergen found within the borders of Tennessee. The American hazelnut is found in woodlands and cultivated areas and is classified in the shrub or small tree category. Its pollen causes respiratory allergic reactions and has been shown to be as allergenic as the birch or alder tree; however, exposure to this allergen is typically limited.