Allergies to animals can take two years or more to develop and may not subside until six months or more after ending contact with the animal. Carpet and furniture are a reservoir for pet allergens, and the allergens can remain in them for four to six weeks. In addition, these allergens can stay in household air for months after the animal has been removed. Therefore, it is wise for people with an animal allergy to check with the landlord or previous owner to find out if furry pets had lived previously on the premises.

Preventive strategies

• Remove pets from your home if possible.
• If pet removal is not possible, keep them out of bedrooms and confined to areas without carpets or upholstered furniture.
• Wear a dust mask and gloves when near rodents.
• After playing with your pet, wash your hands and clean your clothes to remove pet allergens.
• Avoid contact with soiled litter cages.
• Dust often with a damp cloth.

Created by the National Institutes of Health.