Dust mites - a major allergen for people - thrive in places where your dog spends the most time.

In addition, pollen, especially from cryptomeria, is a major allergen for the nearby population centers.

Nobody opposes a rule that would require a clear indication when a product contains a major allergen.

Profilin is the major allergen present in birch, grass, and other pollen.

The major allergen of the domestic cat is produced in the saliva and sebaceous (oil) glands in the skin.

"Both dogs and cats have what we call minor allergens, so it's not only the major allergens," he says.

Dust builds up on bathroom vents and blinds like crazy, and it's a major allergen.

A hypo-allergenic strain of soybean was tested in 2003 and shown to lack the major allergen that is found in the beans.

The major allergen is a protein called Bet v I.