Allergen
Definition: Noun; an allergen is any substance which may trigger an allergic reaction.
Pronunciation: al-ler-jen
Examples:
The allergen carried by cats is feld 1, which is found mainly in a cat's saliva. Transferred to its fur by grooming, the saliva dries into airborne microscopic flakes, which attract like magnets to clothing, carpeting and drapes. Allergies to cats manifest in sneezing, runny nose ("hayfever"), to itchy skin, to the more severe conditions of asthma and/or hives.
Cats also are troubled by certain allergens, caused by food allergies, and inhaled allergens, with similar symptoms, including itchy skin. A severe asthma attack should be considered a veterinary emergency.
Pronunciation: al-ler-jen
Examples:
The allergen carried by cats is feld 1, which is found mainly in a cat's saliva. Transferred to its fur by grooming, the saliva dries into airborne microscopic flakes, which attract like magnets to clothing, carpeting and drapes. Allergies to cats manifest in sneezing, runny nose ("hayfever"), to itchy skin, to the more severe conditions of asthma and/or hives.
Cats also are troubled by certain allergens, caused by food allergies, and inhaled allergens, with similar symptoms, including itchy skin. A severe asthma attack should be considered a veterinary emergency.
Source...