Those who react to airborne allergens usually have allergic rhinitis and allergic conjunctivitis. Airborne allergens include dust mites, cockroach parts, pollens, and molds:

• Dust mites These microscopic creatures are one of the most common causes of allergies and are present year-round in most parts of the country, although they do not live at high altitudes. Dust mites live in bedding, upholstery, and carpets.

• Cockroaches The body parts and waste products of these insects are also a major household allergen, especially in inner cities. Asthma rates of inner city children are high, probably due to cockroach exposure in overcrowded buildings.

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