Definitions for "Allergens"
Substances that cause an allergic response in some individuals, and may cause a runny nose, watery, itchy eyes, rash, or wheezing. Allergens are present in saliva, urine, and dander of warm-blooded animals such as dogs, cats, birds, and rodents. They are also present in plants.
Substances which cause abnormal sensitivities and allergic reactions, such as pollens, molds, and dust mites.
An allergen is any substance that triggers an allergic reaction. Common respiratory allergens are grass pollen, mould spores or house dust mite faeces (present in dust); other allergens may affect the skin or the digestive system.
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See Allergen.