Many common biological contaminants found in homes and buildings can cause allergies. Exposure to dust mites, pet dander, cockroaches, rats, mice and latex are some of the most common culprits.
An allergy is an exaggerated immune response to a substance. People and pets can be allergic to almost any substance. However, there are common allergens that a high percentage of allergy sufferers react to when exposed.
Allergic reactions occur after repeated exposure to a specific biological allergen. A reaction may occur immediately upon re-exposure or after multiple exposures over time. As a result, people who have noticed only mild allergic reactions, or no reactions at all in the past, may suddenly find themselves very sensitive to particular allergens.
Fortunately, when potential allergen hazards are recognized through testing the indoor environment, these allergens and potential asthma triggers can be properly dealt with.